DENSO Spark Plug Catalog

SPARK PLUG CATALOG 2008 / 2009TOYOTA FORMURA 1 TEAM TOYOTA TEAM SARD

SUBARU WORLD RALLY TEAM

KTMHONDA LCR

0.4mmWorld’s Finest Diameter

iridium alloy center electrode

(as of May 2007)

2007 SUZUKA 8HOURS VICTORY

www.globaldenso.com/PLUG/

VictoryVictory

YOSHIMURA SUZUKI

MOTOR

SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA

PHILIPPINESSAUDIARABIA

SINGAPORETAIWAN

THAILAND

VIETNAMJAPAN

MOTOR

CYCLE

EUROPE

&USA

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

Victory

DENSO RACE SUPPORT HISTORY 1998-2007DENSO RACE SUPPORT HISTORY

IA01-32,34

IA01-32,34

IAE01-32,34

IA01-34

DENSO Racing PlugDENSO Racing Plug

DUCATI916C.Fogarty

FOGGY PETRONAS

TEAM PROCIRCUIT KAWASAKIM. BROWN & 3 riders

M. BROWN & 3 riders

KTMG.LANGSTON

2006 IRIDIUMPOWER BOOTH AT SUZUKA 8Hrs 2006 IRIDIUMPOWER BOOTH AT SUZUKA 8Hrs

YAMAHA KURZC. MELOTTE & 3 riders

C. MELOTTE & 3 riders

WGP125 Noboru UEDA& Masao AZUMA

WGP125Noboru UEDA & Masao AZUMAWGP250Naoki MATSUDO & Taro SEKIGUCHI

WGP125Masao AZUMA & Yoichi UIWGP250Naoki MATSUDO & Team LCR

Gilera(WGP250)R.LocatelliM.Simoncelli

http://www.globaldenso.com/PLUG/

1998 1999 2000 2001 2002 2003Motorcycle

1998 1999 2000 2001 2002 2003Race Cars

F1

WRC

Japa

nJa

pan

SuperGT

D1

JGP(R2-1)

JMX

DRAG

WGP

AMA MX

WMX

WSB/WSS

GT500 ChampionGT500 Champion

JSB(S-NK) Champion JSB 1000 Champion

IA 125 Champion

WMX Champion

IB 250 Champion

Prostock Second Champion Prostock Champion

GT500 Champion

IW01-27

IW01-24,27

IQ01-31 DENSO Racing Plug

1 Podium

4 Podiums

3 Victories

3 Victories3 Victories 1 Victories1 Victories

AMA EASTCHAMPIONAMA EASTCHAMPION

7 Victories7 Victories

8 Victories 5 Victories

2 Victories

au SupraGT500

CHAMPION

au SupraGT500

CHAMPION

Castrol TOM'SGT500

CHAMPION

Castrol TOM'SGT500

CHAMPION

WORLDCHAMPION

WORLDCHAMPION

Esso SupraGT500

CHAMPION

Esso SupraGT500

CHAMPION

DENSO SupraGT500

2nd

ZENT SupraGT500

CHAMPION

Tom's SC430GT500

CHAMPION

Rd.1 Suzuka IRIDIUM POWER

WGP Debut Win

AZUMA wins Suzuka GP

UEDA wins Italian GPAMA EASTCHAMPION

KENZKeiichi KITAGAWA

KENZKeiichi KITAGAWA

JSB(S-NK)CHAMPIONJSB(S-NK)CHAMPION

IA 125CHAMPION

IA 125CHAMPION

WMX 125CHAMPIONWMX 125

CHAMPION

IB 250CHAMPION

IB 250CHAMPION

JSB 1000CHAMPION

GP 125CHAMPION

D1CHAMPION

Suzuka8hours

3rdYOSHIMURA

Suzuka8hoursVictory

YOSHIMURA

K.SAAI

IB 125CHAMPION

MICHAMPION

PROSTOCKCHAMPION

PROSTOCKCHAMPION

PROSTOCKCHAMPION

TOYOTA F1 Team

Taking Malaysian GP Podium Position TAKING

PODIUM POSITION

TOYOTA F1 Team

Taking Malaysian GP Podium Position TAKING

PODIUM POSITION

JSB1000A.WATANABE(2ND)YOSHIMURAK.AKIYOSHI(4TH)YOSHIMURAGP250Y.UI(3RD)PRO-TECGP125H.KIKUCHI(4TH)BATTLE FIELDST600A.WATANABE(2ND)YOSHIMURA

5 Podiums

SupplyTOYOTA F1 Racing Plugs

DENSO RACE SUPPORT HISTORY 1998-20071998-2007

Corporate sponsor

Corporate sponsor

IA01-32,34 IAE01-32,34

IA01-34IAE01-32,34

IVAN TEDESCO & 3 riders

2006 IRIDIUMPOWER BOOTH AT SUZUKA 8Hrs

SUZUKI KURZ L. DOVES & 1 rider

WGP125 Yoichi UI & A.DoviziosoWGP250Naoki MATSUDO & Taro SEKIGUCHI & Team LCR

WGP250 Team LCR Robert Locatelli & Casey StonerWGP125Toshinaga KUZUHARA & Tomoyoshi KOYAMA

Honda LCR MotoGPCasey Stoner

KAWASAKILIGHT SPEED

N.KUMAKUBO : CHAMPIONY.KAZAMA : 3RDT.YOSHIDA : 5TH

D1 GRAND PRIX D1 GRAND PRIXK.TANAKA : 6THT.SAKUMA : 7THT.FUJIO : 28TH

N.KUMAKUBO : 2NDA.KUROI : 6THT.HIBINO : 8TH

T.YOSHIOKA : 14THT.SAKUMA : 18THK.TANAKA : 20TH (as of July 2007)

(as of July 2007)

DENSO Racing Plug

Honda LCR MotoGPC.Checa

DENSO Racing Plug

KTMH.AOYAMA(WGP250)T.KOYAMA(WGP125)

IAE01-34



IAE01-34,35

Derbi(WGP125)L.PesekN.Terol

IAE01-34,35

IAE01-32,34IA01-34

Team ApriliaT.Koyama(AJO)

MOTO1ONISHI

PRO STOCK BIKE CHAMPIONI.ABEPRO STOCK BIKE 2NDK.NAKAMURA

PRO STOCK BIKEI.ABEK.NAKAMURA

IA250TAJIMANAYA

IA1K.TSUJI

DRAGNAKAMURA

http://wwwhttp://www.globaldenso.com/PLUG/.globaldenso.com/PLUG/http://www.globaldenso.com/PLUG/

2004 2005 2006 2007

2004 2005 2006 2007

GP 125 Champion

M1 ChampionIB 125 Champion

Prostock Champion

GT500 Champion GT500 Champion

D1 Champion

WRC 2nd

IRIDIUM Racing

IU01-27

IRIDIUM RACING

1 Podium1 Podium

4 Podiums4 Podiums


3 Victories 1 Victories

AMA EASTCHAMPION

7 Victories

8 Victories8 Victories 5 Victories5 Victories


au SupraGT500

CHAMPION

Castrol TOM'SGT500

CHAMPION

WORLDCHAMPION

aEsso SupraGT500

NCHAMPION

a

N

DENSO SupraGT500

2nd

DENSO SupraGT500

2nd

ZENT SupraGT500

CHAMPION

ZENT SupraGT500

CHAMPION

Tom's SC430GT500

CHAMPION

Tom's SC430GT500

CHAMPION

Rd.3 Mexico IRIDIUM RACING

Supply WRC Plugs

WRC Debut Win

AMA EASTCHAMPIONAMA EASTCHAMPION

YOSHIMURAWATANABE

KENZNASHIMOTO

Team WillyKIKUCHI

JSB(S-NK)CHAMPION

IA 125CHAMPION

WMX 125CHAMPION

IB 250CHAMPION

JSB 1000CHAMPIONJSB 1000

CHAMPION

GP 125CHAMPION

GP 125CHAMPION

D1CHAMPION

D1CHAMPION

Suzuka8hours

3rdYOSHIMURA

Suzuka8hours

3rdYOSHIMURA

Suzuka8hoursVictory

YOSHIMURA

Suzuka8hoursVictory

YOSHIMURA

IB 125CHAMPION

IB 125CHAMPION

MICHAMPION

MICHAMPION

PROSTOCKCHAMPIONPROSTOCKCHAMPION



TOYOTA F1 Team

Taking Malaysian GP aking Malaysian GP Podium Pium Position

TOYOTA F1 Team

Taking Malaysian GP Podium Position TAKING AKING

PODIUM POSITIONPODIUM POSITIONTAKING

PODIUM POSITION

TOYOTA F1 Team

Taking Malaysian GP aking Malaysian GP Podium Pium Position

TOYOTA F1 Team

Taking Malaysian GP Podium Position TAKING AKING

PODIUM POSITIONPODIUM POSITIONTAKING

PODIUM POSITION

TOYOTA F1 Team Taking Malaysian GP

Podium Position

P.Solberg : Ranking 6thC.Atkinson : Ranking 10th

P.Solberg : Ranking 5thC.Atkinson : Ranking 7th

DENSO SARD SC430 A.Couto / K.Hiranaka

R.Schumacher : Ranking 10thJ.Trulli : Ranking 12th

R.SchumacherJ.Trulli



JSB1000A.WATANABE(YOSHIMURA)GP250Y.UI(PRO-TEC)

GP125H.KIKUCHI(BATTLE FIELD)S.TOMIZAWA(FRS)

5 Podiums5 Podiums

1

Spark plug technology recognized the world over!!

Spark plug technology recognized the world over!!

TOYOTA F1 TEAM Jarno Trulli Ralf Schumacher

http://www.globaldenso.com/PLUG/On DENSO's website, you can search for the appropriate spark plug by auto manufacturer or by vehicle name.

DENSO’s racing-bred, spark plug technology in the world’s ultimate motor sportsThe iridium plug dominates this technology and generates an amazingly high level of response.

Next-generation spark plug that exudes latent engine power with its high-performance spark.

Superlative performance, long life, and high response.

Unbeatable spark technology, fine-tuned for racing.

The evolution of driving — high spec, 0.4 mm diameter iridium center electrode

*Iridium plug as of May 20070.4 mm iridium center electrode

The world smallest diameter

The world smallest diameter*

3M

OT

OR

S

PO

RT

SC

HIN

AIN

DO

NESIA

KO

RE

AM

ALA

YS

IAPHILIPPINES

SAUDIARABIASINGAPORE

TA

IWA

NTH

AILA

ND

JA

PA

NM

OT

OR

C

YC

LE

EU

RO

PE

&

US

AS

MA

LL

E

NG

INE

CR

OS

S

REFERENCEP

AR

T

NU

MB

ER

SPARK PLUG CATALOG 2008/2009DENSO RACE SUPPORT HISTORY 1998-2007

F1 motor sports

WGP motor sports

WRC motor sports

SUPER GT motor sports

DENSO SPARK PLUG with ME F1

DENSO SPARK PLUG with ME WRC

DENSO SPARK PLUG with ME D1

DENSO SPARK PLUG with ME ALL JAPAN ROAD RACE CHAMPIONSHIP

DENSO PLUGS site English version opened

Reason for high performance of 0.4 mm diameter spark plugs

Iridium Power: product line-up

Iridium Power: specifications

Iridium Tough: specifications

Iridium Racing: specifications

Q&A about tuning cars

Q&A about motorcycles

The plugs configuration

IDENTIFYING DENSO PLUGS

Basic spark plug information

Safety concerns

Comparison Between Genuine DENSO and Fake Spark Plugs

CAR

MOTORCYCLE

CAR

MOTORCYCLE

CAR

MOTORCYCLE, SMALL ENGINE

CAR

MOTORCYCLE

CAR

MOTORCYCLE

CAR

CAR

CAR

MOTORCYCLE

CAR

MOTORCYCLE

DAIHATSU

FORD JAPAN

HONDA

ISUZU

LEXUS

MAZDA

MITSUBISHI

NISSAN

SUBARU

SUZUKI

TOYOTA

ALFA ROMEO

AMC

AMG MERCEDES

ASTONMARTIN

AUDI

AUTOBIANCHI

BENTLEY

BERTONE

BMW

BMW ALPINA

BUICK GM

CADILLAC GM

CATERHAM

CHEVROLET GM

CHRYSLER

CITOROEN

DAEWOO（大字）

DODGE CHRYSLER

FERRARI

FIAT

FORD EUROPE

FORD U.S.A.

HOME PARK

HUMMER GM

HYUNDAI（現代）

INNOCHENTI

JAGUAR

KIA（起亜）

LAMBORGHINI

LANCIA

LAND ROVER

LINCOLN U.S.A.

LOTUS

MASERATI

MCC SMART

MERCEDES BENZ

MERCURY FORD

MORGAN, OLDSMOBILE GM

OPEL

PANTHER

PEUGEOT

PLYMOUTH

PONTIAC GM

PORSCHE

RENAULT

ROLLS ROYCE

ROVER

SAAB

SATURN

TALBOT

TVR

VOLKSWAGEN

VOLVO

HONDA

KAWASAKI

SUZUKI

YAMAHA

ADIVA

APRILIA

BENELLI

BETA

BIMOTA

BMW

BOSSHOSS

BUELL

BULTACO

CAGIVA

DERBI

DUCATI

ENFIELD

ETHOS DESIGN, GG

GASGAS

GHEZZI&BRIAN

GILERA

HARLEY - DAVIDSON

HUSABERG

HUSQVARNA

HYOSUNG

ITALJET

KANNON

KTM

KYMCO

LAVERDA

LEM

MAGNI

MALAGUTI

MONDIAL, MONTESA

MOTO GUZZI, MuZ

MV AGUSTA

MZ

OVER

PEUGEOT

PGO, PIAGGIO

ROYAL ENFIELD

SACHS

SANYANG（SYM）

SCORPA

SHERCO

SOLEX

TITAN

TM RACING

TOMOS, TRIUMPH

URAL

VEE TWO

VERTEMATI

VESPA

VOR

VYRUS

RACINGKARTS

MARINES & SNOWMOBILES

SMALL ENGINE & INDUSTRIAL

CAR MAKER IRIDIUM PART NUMBER → DENSO IRIDIUM POWER / TOUGH

Iridium Power, Tough, Racing Chart

DENSO PLUG SPECIFICATIONS(DENSO TYPE→PART NUMBER)

DENSO PLUG SPECIFICATIONS(PART NUMBER→DENSO TYPE)

IRIDIUM POWER SERIES SALES RANKING

SALES COMPANIES

IRIDIUM POWER 16

MOTOR SPORTS 04

IRIDIUM TOUGH 22

108

112

113

113

117

123

131

133

136

147

147

148

148

148

151

151

151

151

154

154

155

155

156

156

157

159

159

159

159

160

161

162

162

162

162

162

163

163

164

164

164

165

165

165

165

168

169

169

170

170

172

172

173

174

175

175

176

177

177

177

177

179

182

189

192

196

202

202

IRIDIUM RACING 26

Q&A about plug performance 30

CHINA 44

INDONESIA 55

KOREA 61

MALAYSIA 65

PHILIPPINES 72

SAUDIARABIA 76

SINGAPORE 79

TAIWAN 86

THAILAND 98

JAPAN / CAR 104

EUROPE&USA / CAR 147

JAPAN / MOTOR CYCLE 182

SMALL ENGINE 216

CROSS REFERENCE 233

MAKER GENUINE PART NUMBER CHART 261

EUROPE&USA / MOTOR CYCLE 202

IRIDIUM PLUS 25

01

04

05

06

07

08

09

10

11

12

14

18

20

24

28

32

33

34

36

37

40

43

44

50

55

59

61

64

65

69

72

74

76

79

86

95

98

102

104

107

202

202

203

203

204

204

204

204

204

205

206

206

206

206

206

207

208

209

209

209

209

209

211

211

211

211

211

211

211

212

212

212

212

212

213

213

213

213

213

213

213

213

213

214

214

214

214

215

215

216

217

221

260

267

277

289

301

302

TOYOTAFORMULA1 TEAMTOYOTAFORMULA1 TEAM

Aspiring after the long-cherished desire of winning 1st place at the F1 Japanese Grand Prix at Fuji Speedway with the TF107 chassis

DENSO supports a broad range of motor sports.

DENSO supports Team Toyota as a technical sponsor, having entered the world’s pre-eminent racing on four wheels, Formula One (F1). DENSO provides spark plugs specially made for F1 engines and in 2004 became a corporate sponsor of the Panasonic TOYOTA Racing F1 Team. DENSO supports the team by making full use of technology that is unique to DENSO, including spark plugs, radiators, oil coolers, and alternators.

TOYOTA fulfilled a dream they had held for years by entering F1 competition in 2002. TOYOTA took the 6th place prize in their racing debut at the Australian Grand Prix and showed their ability to the world.

In 2005, with the goal of standing on the winner’s podium, TOYOTA achieved this goal by their second race at the Malaysia Grand Prix. Reaping the fruits of the prior three years, they made great strides and won 4th place in the Constructor’s composite rankings. Despite further expected leaps for 2006, they could not fare better than the previous year and ended up in 6th place overall in the Constructor’s composite rankings.

In the upcoming 2007 season, with their more advanced TF107 specification F1 chassis, TOYOTA aspires for another success surpassing the 2005 season and to accomplish their long-cherished desire - winning 1st place at the F1 Japanese Grand Prix at Fuji Speedway in 2007.

ALL ABOUT MOTOR SPORTSSUPPORTED BY DENSO

Born: July 13, 1974 in ItalyHeight: 173 cm; Weight: 60 kgRecord for the last three years:2004 6th place, F1 Series2005 7th place, F1 Series2006 12th place, F1 Series

Jarno Trulli

Born: June 30, 1975 in GermanyHeight: 178 cm; Weight: 73 kgRecord for the last three years:2004 9th place, F1 Series2005 6th place, F1 Series2006 10th place, F1 Series

Ralf Schumacher

DRIVERS PROFILE

Equipped with DENSO SPARK PLUGS, customized for the TF107

MOTORSPORTSSupported byDENSO

http://www.globaldenso.com/PLUG/MOTOR

SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA

PHILIPPINES

SAUDIARABIA

SINGAPORE

TAIWAN

THAILAND

JAPAN

MOTOR

CYCLE

SMALL

ENGINE

CROSS

REFERENCE

PART

NUMBER

EUROPE

&USA

4

Aiming at the pinnacle of motorcycling, DENSO is full-throttle.

The FIM Road Racing World Grand Prix (WGP) was started by the Fédération Internationale de Motocyclisme (FIM) in 1949 and embodies the world’s top motorcycle racing. Initially, this racing was formerly categorized into seven classes, but today it is classified into three. MotoGP is the top class, followed by GP-250cc and GP-125cc.

MotoGP, formerly the GP-500cc class that was renamed in 2002, races monster motorcycles with the greatest features of four-cycle engines equipped with an upper limit of 800cc engine displacement. A single machine can harness 200 horsepower, and maximum speeds easily surpass 300 km/h.

DENSO has supported WGP-125cc and WGP-250cc since 2001. Many winners have been supported by DENSO, including the winning debut of the Iridium Plug at the Suzuka Grand Prix in April 2001.

DENSO has entered the MotoGP class with HONDA’s team LCR since 2006. In 2007, DENSO continues to support HONDA LCR, together with Tomohiro Koyama who transferred to Team KTM, and Hiroshi Aoyama of Team KTM. They will again be engaged in heated races for the podium in all classes this year.


Born: October 15, 1972 in SpainHeight: 174 cm; Weight: 69 kgRecord for the last three years:2004 5th place, WGP MotoGP

class2005 9th place, WGP MotoGP

class2006 15th place, WGP MotoGP

class

Carlos Checa

Born: March 19, 1983 in JapanHeight: 155 cm; Weight: 48 kgRecord for the last three years:2004 2nd place, Japan

Championship 250cc class

2005 8th place, WGP-125cc class

2006 15th place, WGP-125cc class

Tomohiro Koyama

RIDERS PROFILE

Equipped with DENSO RC212V custom racing plugsEquipped with DENSO RC212V custom racing plugs

HONDA LCR & KTMWGP



SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

5

Aiming for WRC 2007 victory with new SUBARU ImprezaBestowed with the title “World Championship” by the

Fédération Internationale de Automobile (FIA), the World Rally Championship (WRC) is another premier world racing crown, as is F1. Different from formula race cars that have each part individually designed for racing, WRC uses commercially available stock cars. Rallies take place on local streets in a variety of places, such as snow-covered roads in the Alps, safari trails in deserts, or mountainous roads in Mexico, and not on a circuit course.

DENSO supports the Subaru World Rally Team, winning the most WRC championships among Japanese manufacturers. In 2005, DENSO IRIDIUM PLUG was first equipped in the Subaru Impreza WRC, winning its debut race, which was the third race of the season and held in Mexico. With Petter Solberg as its ace driver in 2005, the team won three races in its attempt to recapture the Driver’s Championship it last held in 2003, but unfortunately ended the season in 2nd place. In the following year of 2006, the team marked “best time” no less than 38 times that season and demonstrated their speed, although they did not win a single race. In 2007, the team is aiming for victory together with a brilliant young driver, Chris Atkinson.

WRC

SUBARUWORLD RALLY TEAMWRC

Born: November 18, 1974 in NorwayRecord for the last three years:2004 2nd place, WRC Driver’s

Championship2005 2nd place, WRC Driver’s

Championship2006 6th place, WRC Driver’s

Championship


Petter Solberg

DRIVERS PROFILE

Born: November 18, 1979 in AustraliaRecord for the last three years:2004 1st place, Asia Pacific

Super 1600 Championship2nd place, Australian Rally Championship

2005 12th place, WRC Driver’s Championship

2006 10th place, WRC Driver’s Championship

Chris Atkinson

Equipped with DENSO IRIDIUM Custom Racing Plugs for the SUBARU Impreza WRC 2007 Equipped with DENSO IRIDIUM Custom Racing Plugs for the SUBARU Impreza WRC 2007

SUBARUWORLD RALLY TEAM



SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA

PHILIPPINES

SAUDIARABIA

SINGAPORE

TAIWAN

THAILAND

JAPAN

MOTOR

CYCLE

SMALL

ENGINE

CROSS

REFERENCE

PART

NUMBER

EUROPE

&USA

6

Aiming at victory with DENSO SARD SC430Super GT is one category of motor

racing, where more than 20 types of supercars, modified commercial vehicles (GT cars), participate. In 1994, the Japan GT Championship (JGTC) was established, but has been called the Super GT since 2005, expanding beyond Japan and restarting as an international series race. The Super GT has grown to be one of the most popular motor sports in Japan, with an average attendance of 45,000 at events, and attracts approximately 320,000 people in total during the year. DENSO supports TOYOTA Team SARD that races in the

GT500 class. In 1989, TOYOTA Team SARD was established as one of the Toyota Works Teams, and has won four victories in the Japan GT Championship and the Super GT, including Rounds 1 and 4 at Fuji Speedway in 1997, Round 7 at Autopolis in 2003, and Round 3 at Sepang Circuit (Malaysia), in 2004. In 2005, TOYOTA Team SARD entered the TOKACHI 24 Hours race as LEXUS Team SARD in a hybrid vehicle, the DENSO LEXUS GS450h, which was the first hybrid vehicle to be entered in such a race. The team completed the race with superb style.

MOTORSPORTS

Equipped with DENSO Custom Racing Plugs

Supported byDENSO

SUPER GT

TOYOTATEAM SARD


Born: October 4, 1981 in JapanHeight: 176 cm; Weight: 66 kgRecords in the last three years:2004 5th place in Europe F3 Championship　　　　 14th place in Japan F3 Championship2005 13th place in Formula Nippon F3000　　　　 15th place in Super GT, GT300 class2006 Entered Formula Nippon F3000　　　　 23rd place in Super GT, GT500 class

Katsuyuki Hiranaka

Born: December 14, 1976 in PortugalHeight: 173 cm; Weight: 60 kgRecord for the last three years:2004 2nd place in JGTC GT5002005 16th place in Super GT, 　　　　GT500 class 1st place, 　　　　International Pokka 1,000 Km2006 23rd place in Super GT, GT500 class

Andre Couto

DRIVERS PROFILE


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

7

withMEDENSO SPARK PLUG

DENSO SPARK PLUGS take active supporting roles in all sorts of scenes. We interviewed some major motor sports figures whom DENSO supports and asked them why they selected DENSO.

Akitoshi Arai

F1 is called the world’s greatest automo-bile racing. Of course, as its technology sig-nificantly evolves, performance also is ever evolving. It is no exaggeration to state that F1 cars are the crowning achievement of leading-edge engineering and materials. In recent F1 grand prix racing, various reg-ulations change every season over a broad range of aspects including the engine, chas-sis, and tires. In these circumstances of F1 racing, first place in a race cannot be won only by a driver’s technique anymore, not to mention the F1 championship title. I think that first place can become a reality only when all the various sections of teams, tech-nologies, and suppliers, function in a bal-anced manner. In that sense, the TOYOTA F1 Team has been racing in an ideal envir-onment because they can develop F1 cars with all the technologies integrated, includ-ing manufacturing all the parts of an engine and the chassis in one location, and per-forming aerodynamic experiments. Engi-neers from each section meet face-to-face every day, and can hold discussions while using the actual chassis and engine. This provides a big advantage for accelerating development. I am responsible as the director of technol-ogy coordination of this team, and to com-municate with TMG in Germany, the Toyota Higashi-Fuji Technical Center, and with each supplier, in order to make strides with-in the entire F1 Project. I am very satisfied with the development capabilities of DEN-SO and other suppliers, and very much ap-preciate their cooperative structures, too. Development of F1 cars can never really be said to be complete, because it is evolving every day by injections of cutting-edge tech-

nology. Such develop-ment efforts produce re-sults with manufacturing skills that drivers can rely on and to which they en-trust their lives, and with the reliability of the manu-facturers and people in-volved in the development. I believe this relationship of trust improves the com-pleteness of cars and brings good results.

An F1 engine turns at a maximum 19,000 rpm, which is approximately two times fast-er than passenger cars, and generates more than 700 horsepower. It is not difficult to imagine that an F1 car engine is subject to extremely tough conditions since it must maintain such a high rpm rate all through a race. In the past few years, the parts that electronically control functions have been regulated and improvement of drivability is required more than ever. That means it is becoming more important to develop an en-gine while seeking speed, durability, and driver-friendliness. For that reason, each and every part of the engine is required to have extreme precision and reliability. Need-less to say, the relationship of trust with sup-pliers is very important. DENSO provides us with alternators and oil coolers, and de-velops radiators together with us from the primary steps of development. Moreover, with regard to spark plugs, our team has been racing with DENSO’s F1 SPARK PLUGS since our entry into the world of F1 in 2002. This is because we can realize high performance with DENSO SPARK PLUGS under the most severe use condi-tions without any trouble.

Although the spark plugs are very small parts in size, their performance and reliabili-ty are realized and based on the accumula-tion of daily efforts made by many research-ers, engineers, and operators at manufacturing sites. This is exactly the same as the development of an F1 car. I find DENSO applying technologies culti-vated from F1 racing to their various prod-ucts, and feel that both companies receive benefits from our F1 Project. The DENSO IRIDIUM PLUG that realized ignition perfor-mance and durability of F1 racing is repre-sentative of products that have been cre-ated from such a philosophy. This is why F1 grand prix racing is “the driving laboratory.”

With a high level of perfection, the completion of an F1 car is accomplished with total reliance upon all the people and manufacturers engaged in its development

Not only F1 cars, but also excellent things are built from the accumulation of effort

With a high level of perfection, the completion of an F1 car is accomplished with total reliance upon all the people and manufacturers engaged in its development

Not only F1 cars, but also excellent things are built from the accumulation of effort

Joined Toyota as a chassis design engineer in 1979. Transferred to Brussels in 1987 with Toyota’s expansion in the European market. Transferred to the Motor Sports Division of Toyota Higashi-Fuji Technical Center in 1990 and engaged in development of the TS010 for racing. Participated in 24 Heures du Mans with the TS010 in

1992 and 1993. Particularly, in 1993, Eddie Irvine recorded the fastest lap in the TS010. Joined in development of the initial Supra GT in 1994. Engaged in development of commercial passenger cars. Returned to the Motor Sports Division in 2002 and joined the F1 Project. Transferred to TMG as senior executive coordinator of the Chassis Division in 2004. Assigned as director of technology coordination in 2006.

Akitoshi Arai

Technological developments make advances every day. This is the world of F1, aptly named “the driving laboratory.”

TMG Engineering Coordination, Director

F1


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Petter SolbergSUBARU World Rally Team Driver

The WRC (World Rally Championship) is extremely competitive compared with other motor sports. You’re darting and jumping. You’re in both the fiercest heat, and snow blizzards. You’re racing for hundreds of kilo-meters while controlling a machine under these kinds of the severest of conditions. You are constantly pushing yourself and your machine to the absolute limit. So there is not just ordinary stress on your machine, to be sure. What does it take to become a WRC cham-pion? It requires a variety of skills. It takes driving technique, extreme force of will, and total concentration. It also requires a fast and well-balanced machine. And, team ef-fort. When all three of these come together, then you can win for the first time. However, you can’t win with just a fast machine. The most important winning factor is absolute confidence that you can race on toward the goal. You never really know what might hap-pen while racing under these severest of conditions. And, the rally ends the moment your machine breaks down. All your efforts up to that moment amount to nothing. Therefore, high reliability is demanded from each and every part that comprises your machine. In particular, spark plugs are said to be the heart of every engine and are criti-cal components of the machine. DENSO IR-IDIUM RACING are excellent parts that fully meet these demands. The Subaru World Rally Team (SWRT) has achieved brilliant results more than a few times in the past thanks to support from the excellent reliability of their machine. I can definitely say that these excellent re-sults would not have been possible without this reliability. Also, we provide feedback for production vehicles using the top level ex-pertise that we have cultivated. The WRC is, so to speak, a laboratory for the latest

technology.

In order to win the WRC, you must first build the ideal machine. For this reason, as a team, we repeat countless tests day and night to create this superlative machine. Being a good rally driver doesn’t simply mean being fast. It also demands the ability to develop a car. The deciding factor is the movement of the machine. However, movement and acceler-ation response are closely connected. For example, controlling a machine to move ex-actly as you have imagined while driving in an extreme situation requires superb accel-erator work, rather than steering. You want an engine that takes off from a partially open throttle, with dramatic acceleration. In other words, if acceleration response is good, then you will be able to not only go fast, but also control the complicated move-ments of the machine more easily. A ma-chine that does not have constant accelera-tion response is like a high-strung horse. It’s dangerous, and not for riding. The SWRT is a prestigious team that has been making excellent efforts in the WRC for the last dozen years. Their machines have been improving, and so the potential of their machines has also been increasing. In particular, the standard acceleration re-sponse that I wanted has been fully ach-ieved. In doing this, the success of the en-gine’s overall rpm in no small way has been due to the DENSO IRIDIUM RACING that reliably fire over and over again. From now on, I will devote all my energy to becoming the driver’s champion along with my trusted and excellent staff, my machine, and my suppliers.

The rally ends the moment your machine breaks down.

If you have good acceleration response, controlling the machine's motion and traction becomes much easier.

Racing straight towards the goal:The most important requirement for victory.

Petter SolbergBorn: November 18, 1974 in Askim, Norway.Currently resides in Spydeberg, NorwayInterests: Cycling, squash, and filmsFirst rally: 1996WRC debut: 1998, SwedenCo-driver: Phil MillsOfficial website: http://www.pettersolberg.com/Striving to win the championship together with DENSO IRIDIUM RACING (used exclusively in the Subaru Impreza WRC 2006)

WRC


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I’m obsessed with wondering, “Man, just how crazy I can be?” in D1 where more ad-vanced techniques are required year after year, and the competition has become the most severe.Being crazy is a compliment in our world. When driving at crazy approach speeds and crazy angles, Mr. Keiichi Tsuchiya the head judge, laughs aloud and says, “Hah! He is really crazy!” The audience reacts to my performance with cheers and applause. I’m glad when they clap for me and tell me things like, “you were pretty cool that last time.” Otherwise, I’ve got to think it’s all over if nobody tells me stuff like that. So, I don’t forget to be crazy, as a service to the fans. On one occasion, I stood up on top of the Aurora Vision, this huge display screen, when I was introduced to the audience. An-other time, I performed my rodeo driving while I was being introduced. If I don’t give such performances to the audience, it’s not me. I want to cheer myself up by showing my performances to as wide an audience as possible. I’m also doing this because I want to be an unforgettable driver and have

everybody think I’m crazy. Needless to say, I’m also ob-sessed with competition, since I am a professional driver and I’m required to produce results. I search for my own unique driving style using approach speed, drift angle, and in turns. Since a ma-chine used in D1 staging re-quires relatively strong control, not just by steering but also by working the accelerator, engine response is extremely critical. If my machine does not truly re-spond exactly with how I work the accelerator pedal, the ma-

chine will immediately spin out on the course, and I will have no confidence to drive it. In recent D1 staging, it has become com-mon to start drifting the vehicle at speeds approaching 200 km/h, which is called high-speed drifting. This results in not passing the qualification round only by differences in approach speeds of only 1 or 2 km/h. Ac-cordingly, acceleration performance has be-come extremely important. Now we are in an age when engine power must be opti-mized by generating even one or two addi-tional horsepower. In this respect, spark plugs are one of the fundamental parts that cannot fail us D1 drivers, and DENSO IRIDIUM RACING have sufficient performance to meet our re-quirements.

In D1 staging, engines are used heavily. Since vehicles move at an angle and do not drive straight ahead into the wind, I think D1 staging creates very severe conditions, not only for the engine itself, but also everything that corresponds to it. When following driv-ers ahead of us, we have to drive the way they do. So we cannot avoid reaching the engine rpm limit. In such conditions, low-performance plugs may have an electrode damaged after reaching the rpm limit sever-al times, or may even melt due to poor dur-ability after being weakened by knocking. This is really a problem. So, it’s nearly im-possible for us to use spark plugs that we can’t rely on. If we keep winning each round up to the fi-nals, we need to run the course many times. Spark plugs can’t be replaced every time be-fore each run, so durability is extremely im-portant. I want my plugs to last at least three days, Friday, Saturday, and Sunday. I

use DENSO IRIDIUM RACING without changing them for three days, and I have no trouble. Whenever the engine condition is bad, I check the spark plugs. A computer controls fuel intake now, but we can roughly tell by checking the spark plug when a piston ring is melted away. When I was using an en-gine before this one and I felt the engine power had decreased, I checked the spark plugs. As expected, the spark plug in cylin-der 3 had been burnt differently from the oth-ers. When I measured each cylinder’s com-pression, only cylinder 3 had weak results. For something that can’t be found just in numbers, you can find it by checking the spark plugs. I think the spark plugs are the only place where we can visually check what’s going on inside the combustion chambers.D1 staging is getting more severe than ever before. In this situation, I really appreciate the surefire spark and high durability of DENSO IRIDIUM RACING. When my ma-chine breaks down, it’s all over for me. Good quality spark ignition generates im-provements in both power and response.For the fans who support me, I refine all my performances including drifting, and I do drive crazy, hoping to become the series champion together with my reliable team staff, machine, and my suppliers.

I’m obsessed with wondering, “Man, just how crazy I can be?” in D1 where more ad-vanced techniques are required year after year, and the competition has become the most severe.Being crazy is a compliment in our world. When driving at crazy approach speeds and crazy angles, Mr. Keiichi Tsuchiya the head judge, laughs aloud and says, “Hah! He is really crazy!” The audience reacts to my performance with cheers and applause. I’m glad when they clap for me and tell me things like, “you were pretty cool that last time.” Otherwise, I’ve got to think it’s all over if nobody tells me stuff like that. So, I don’t forget to be crazy, as a service to the fans. On one occasion, I stood up on top of the Aurora Vision, this huge display screen, when I was introduced to the audience. An-other time, I performed my rodeo driving while I was being introduced. If I don’t give such performances to the audience, it’s not me. I want to cheer myself up by showing my performances to as wide an audience as possible. I’m also doing this because I want to be an unforgettable driver and have

everybody think I’m crazy. Needless to say, I’m also ob-sessed with competition, since I am a professional driver and I’m required to produce results. I search for my own unique driving style using approach speed, drift angle, and in turns. Since a ma-chine used in D1 staging re-quires relatively strong control, not just by steering but also by working the accelerator, engine response is extremely critical. If my machine does not truly re-spond exactly with how I work the accelerator pedal, the ma-

chine will immediately spin out on the course, and I will have no confidence to drive it. In recent D1 staging, it has become com-mon to start drifting the vehicle at speeds approaching 200 km/h, which is called high-speed drifting. This results in not passing the qualification round only by differences in approach speeds of only 1 or 2 km/h. Ac-cordingly, acceleration performance has be-come extremely important. Now we are in an age when engine power must be opti-mized by generating even one or two addi-tional horsepower. In this respect, spark plugs are one of the fundamental parts that cannot fail us D1 drivers, and DENSO IRIDIUM RACING have sufficient performance to meet our re-quirements.

In D1 staging, engines are used heavily. Since vehicles move at an angle and do not drive straight ahead into the wind, I think D1 staging creates very severe conditions, not only for the engine itself, but also everything that corresponds to it. When following driv-ers ahead of us, we have to drive the way they do. So we cannot avoid reaching the engine rpm limit. In such conditions, low-performance plugs may have an electrode damaged after reaching the rpm limit sever-al times, or may even melt due to poor dur-ability after being weakened by knocking. This is really a problem. So, it’s nearly im-possible for us to use spark plugs that we can’t rely on. If we keep winning each round up to the fi-nals, we need to run the course many times. Spark plugs can’t be replaced every time be-fore each run, so durability is extremely im-portant. I want my plugs to last at least three days, Friday, Saturday, and Sunday. I

use DENSO IRIDIUM RACING without changing them for three days, and I have no trouble. Whenever the engine condition is bad, I check the spark plugs. A computer controls fuel intake now, but we can roughly tell by checking the spark plug when a piston ring is melted away. When I was using an en-gine before this one and I felt the engine power had decreased, I checked the spark plugs. As expected, the spark plug in cylin-der 3 had been burnt differently from the oth-ers. When I measured each cylinder’s com-pression, only cylinder 3 had weak results. For something that can’t be found just in numbers, you can find it by checking the spark plugs. I think the spark plugs are the only place where we can visually check what’s going on inside the combustion chambers.D1 staging is getting more severe than ever before. In this situation, I really appreciate the surefire spark and high durability of DENSO IRIDIUM RACING. When my ma-chine breaks down, it’s all over for me. Good quality spark ignition generates im-provements in both power and response.For the fans who support me, I refine all my performances including drifting, and I do drive crazy, hoping to become the series champion together with my reliable team staff, machine, and my suppliers.

Acceleration response is very important for driving performance unique to D1 Professional Drift Grand Prix

Each and every part is required to be durable for D1 staging, where machines are overused.

Changing the direction of the machine with the accelerator work and getting the machine in line at high speed — all depends on engine response

Changing the direction of the machine with the accelerator work and getting the machine in line at high speed — all depends on engine response

D1 Grand Prix 2005 ChampionKnown as “Waku-waku-san” (or, Mr. Excitement)Famous for “rodeo driving,” when he drifts the car while sticking his upper body out from the window during the introductions of drivers. He says that his special driving characteristic is making sharp turns while maintaining high speeds.

Yasuyuki Kazama

RIDER：渡辺篤 RIDER：秋吉耕佑

Yasuyuki Kazama2005 D1 Grand Prix Champion

D1


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withMEDENSO SPARK PLUG

RIDERRIDER：渡辺渡辺篤 RIDERRIDER：秋吉秋吉耕佑耕佑 RIDER：渡辺篤 RIDER：秋吉耕佑

Clean acceleration when stepping on the gas – what could be better?

Fujio YoshimuraDirector of YOSHIMURA SUZUKI with the JOMO Team. Repre-sentative Director and CEO of YOSHIMURA JAPAN Co., Ltd. Vic-tory in the 2005 Suzuka 300 km Endurance Race, followed by 1st place in the third race of the 2006 ALL-JAPAN ROAD RACE CHAMPIONSHIP, and 3rd place in the 2006 Suzuka 300 km Endur-ance Race, etc. Leading the “world’s strongest private team” in or-der to realize their deeply desired hope of winning the Suzuka Eight-Hour World Endurance Championship Race.

When did the relationship between YOSH-IMURA and DENSO start?

Yoshimura: It’s been very long time, since the time I was in the U.S.A. I guess it was around 1976. My father, (the late Pop Yoshi-mura) had gone to the U.S. before me. The partnership was already firmly established when I got there. Since then, we have main-tained a relationship of trust. Of course, DENSO SPARK PLUGS were equipped on the machine that won the first Suzuka Eight-Hour World Endurance Championship Race in 1978.

You have been doing very well again this year, continuing your results of last year. Where do you find the secret of your speed?

Yoshimura: One of the main factors is the engine being in good condition. It is essen-tial to increase power. In that respect, DEN-SO has made a great effort in many ways. We feedback race data to DENSO, they make new proposals based on the data, and then we use the results again in the race. We both repeat this again and again.

How do you value the DENSO IRIDIUM PLUGS that you are currently using?

Yoshimura: Excellent. When the throttle is opened, the engine revs up cleanly. What else do you need? The ST600 class that we have entered since 2006 requires a broader range of engine rpm. We don’t look

for features in a full-throttle condition, but in-stead in conditions of partial throttle pres-sure; that is, when decelerating and then ac-celerating again, slowly. This depends on the spark plug features. After all, the most important thing in racing is reliability. And when you have even a small concern, it ap-pears in the results of the race. Actually, we haven’t had any trouble caused by our spark plugs.

Please give general drivers some advice (from Director Yoshimura).

Yoshimura: The first thing you realize when you change your spark plugs to DENSO IRI-DIUM PLUGS is good start-up performance. If a plug gives good start-up performance, it also has good performance overall. An-other key point is low fuel consumption, which is also important during the Suzuka Eight-Hour World Endurance Championship Race. Above all, the DENSO IRIDIUM PLUG is the plug that can provide this kind of stable performance.

Legendary winning vehicle of the Suzuka 8 Hour World Endurance Championship Race was also equipped with DENSO SPARK PLUGS

When did the relationship between YOSH-IMURA and DENSO start?

Yoshimura: It’s been very long time, since the time I was in the U.S.A. I guess it was around 1976. My father, (the late Pop Yoshi-mura) had gone to the U.S. before me. The partnership was already firmly established when I got there. Since then, we have main-tained a relationship of trust. Of course, DENSO SPARK PLUGS were equipped on the machine that won the first Suzuka Eight-Hour World Endurance Championship Race in 1978.

You have been doing very well again this year, continuing your results of last year. Where do you find the secret of your speed?

Yoshimura: One of the main factors is the engine being in good condition. It is essen-tial to increase power. In that respect, DEN-SO has made a great effort in many ways. We feedback race data to DENSO, they make new proposals based on the data, and then we use the results again in the race. We both repeat this again and again.

How do you value the DENSO IRIDIUM PLUGS that you are currently using?

Yoshimura: Excellent. When the throttle is opened, the engine revs up cleanly. What else do you need? The ST600 class that we have entered since 2006 requires a broader range of engine rpm. We don’t look

for features in a full-throttle condition, but in-stead in conditions of partial throttle pres-sure; that is, when decelerating and then ac-celerating again, slowly. This depends on the spark plug features. After all, the most important thing in racing is reliability. And when you have even a small concern, it ap-pears in the results of the race. Actually, we haven’t had any trouble caused by our spark plugs.

Please give general drivers some advice (from Director Yoshimura).

Yoshimura: The first thing you realize when you change your spark plugs to DENSO IRI-DIUM PLUGS is good start-up performance. If a plug gives good start-up performance, it also has good performance overall. An-other key point is low fuel consumption, which is also important during the Suzuka Eight-Hour World Endurance Championship Race. Above all, the DENSO IRIDIUM PLUG is the plug that can provide this kind of stable performance.

Legendary winning vehicle of the Suzuka 8 Hour World Endurance Championship Race was also equipped with DENSO SPARK PLUGS

Clean acceleration when stepping on the gas – what could be better?

Reliability that leads to stable, high performance. That’s the best feature of DENSO SPARK PLUGS.

Fujio YoshimuraDirector of YOSHIMURA SUZUKI with the JOMO Team. Repre-sentative Director and CEO of YOSHIMURA JAPAN Co., Ltd. Vic-tory in the 2005 Suzuka 300 km Endurance Race, followed by 1st place in the third race of the 2006 ALL-JAPAN ROAD RACE CHAMPIONSHIP, and 3rd place in the 2006 Suzuka 300 km Endur-ance Race, etc. Leading the “world’s strongest private team” in or-der to realize their deeply desired hope of winning the Suzuka Eight-Hour World Endurance Championship Race.

ALL JAPAN ROAD RACE CHAMPIONSHIP

Fujio YoshimuraRepresentative Director of YOSHIMURA JAPAN Co., Ltd.Director of YOSHIMURA SUZUKI with JOMO Team

Suzuka 8hoursVictory in 2007


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Basic plug information and Q&A

Appropriate information retrieval

Movie

Master brochure data download

Updated information

Introduction of theIRIDIUM POWER series

PR space

http://www.globaldenso.com/PLUG/

DENSO PLUGS siteEnglish version openedDENSO PLUGS siteEnglish version openedDENSO PLUGS site

This site mainly provides product and race support information.

A lot of plug information is contained

Basic plug information and Q&A are provided.







English version opened


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DENSO PLUGS siteEnglish version openedDENSO PLUGS siteEnglish version opened







TOYOTAALLION 2000 SK20BGR11

ALPHARD 3000 SK20R11ALPHARD HYBRID 2400 SK20R11

ALTEZZA 2000 SK20R11AVEVSIS 2000 SK20BGR11AVENSIS 2400 SK20BR11BELTA 1000 SK20HR11

BELTA 1300 SK16HR11BREVIS 2500,3000 SK20BR11

CALDINA 2000 SK20R8CALDINA 2000 SK20BGR11

CAMI 1300 SVK20RZ8CELICA 1800 SK20R11

CELSIOR 4000 SK20R11CELSIOR 4300 SK20R11

CENTURY 5000 SK16R-P11CENTURY 5000 SK16R8-PG

COASTER 4100 SK20R5-GCOROLLA RUNX,ALLEX 1800 SK20R11

COROLLA RUNX,ALLEX 1500 FK20HR11COROLLA,COROLLA FIELDER 1800 SK20R11

COROLLA,COROLLA FIELDER 1500 FK20HR11CROWN MILD HYBRID 3000 SK20BR11

CROWN / MAJESTA 2500 SK16R-P11CROWN / MAJESTA 2500 .SK16R-P11

CROWN / MAJESTA 2500,3000 SK20BR11CROWN / MAJESTA 2500 FK20HBR11

CROWN / MAJESTA 3000,3500 FK20HBR11CROWN / MAJESTA 4000,4300 SK20R11

DYNA 2700 SK16R8-PGDYNA 4100 SK20R5-G

DYNA 4100 SK20R5DYNA,TOYOACE 2000 SK20HR11

DYNA,TOYOACE 4100 SK20R5-GESTIMA 3000 SK20R11

ESTIMA 3500 FK20HR11ESTIMA HYBRID 2400 SK20R11

GAIA 2000 SK20BGR11HARRIER 3000 SK20R11

HARRIER 3500 FK20HR11HARRIER HV 3300 SK20R11

HIACE 2000,2700 SK20HR11HIACE REGIUS 2700 SK16R11

HILUX / SURF 2700 SK20HR11 ISIS 2000 SK20BGR11

IST 1300 SK16R11KLUGER HV 3300 SK20R11KLUGER V 3000 SK20R11

LAND CRUISER / PRADO 2700 SK20HR11LAND CRUISER / PRADO 4700 SK20R11

MARK II BLIT 2500 .SK16R-P11MARK II BLIT 2500 SK20BR11

MARK II WAGON QUALIS 3000 SK20R11MARK II 2500 SK20R-P11

MARK II 2500 SK20BR11MARK II 2500 .SK16R-P11

MARK X 2500,3000 FK20HBR11NADIA 2000 SK20BGR11

NOAH 2000 SK20BGR11OPA 2000 SK20BGR11

PASSO 1000 SK20HR11PASSO 1300 SKV20RZ11

PREMIO 2000 SK20BGR11PRIUS 1500 SK16R11

PROBOX 1500 SK20R8-GPROGRES 2500,3000 SK20BR11

PRONARD 3000 SK20R11RACTIS 1300 SK16HR11

RACTIS 1500 FK20HR11RAV4L,RAV4J 2000 SK20BGR11

RAV4L,RAV4J 2400 SK20R11REGIUS ACE VAN 2000,2700 SK20HR11

RUSH 1500 SXU22PR9SIENTA 1500 FK20HR11SOARER 4300 SK20R11

TOURING HIACE 2700 SK16R11TOYOACE 2000 SK20HR11TOYOACE 2700 SK16R8-PG

VEROSSA 2500 SK20BR11VISTA / ARDEO 2000 SK20BGR11

VITZ 1000 SK20HR11VITZ 1300 SK16HR11

VITZ 1500 FK20HR11VOLTZ 1800 SK16R11

VOLTZ 1800 SK20R11VOXY 2000 SK20BGR11

WiLL VS 1800 SK20R11WINDOM 3000 SK20R11

WISH 2000 SK20BGR11

LEXUSGS350 3500 FK20HBR11

GS430 4300 SK20R11GS450h 3500 FK20HBR11IS250 2500 FK20HBR11IS350 3500 FK20HBR11SC430 4300 SK20R11

HONDAACCORD 2400

SKJ20DR-M11ACCORD EURO R 2000

SK22PR-M11SACCORD WAGON 2400

SKJ20DR-M11ACTY 660 SK20PR-L9

AIRWAVE 1500 SKJ20DR-M13

CIVIC HYBRID 1300 SK16PR-L11CIVIC HYBRID 1300 SK20HPR-L11CIVIC TYPE R 2000 SK22PR-M11S

CIVIC 1500 SKJ16CR-L11CIVIC 1800 SKJ20DR-M11S

ELEMENT 2400 SKJ20DR-M11ELYSION 2400,3000 SKJ20DR-M11

FIT 1500 SKJ20DR-M13FIT ARIA 1500 SKJ20DR-M13

INSPIRE 3000 SKJ20DR-M11

HONDAINTEGRA 2000 SK22PR-M11S

LEGEND 3500 SKJ20DR-M11LIFE DUNK 660 SK20PR-L9MDX 3500 SKJ16DR-M11

MOBILIO 1500 SKJ20DR-M13MOBILIO SPIKE 1500

SKJ20DR-M13ODYSSEY 2400 SKJ20DR-M11

STREAM 2000 SKJ20DR-M13THAT'S 660 SK20PR-L9

VAMOS 660 SK20PR-L9Z 660 SK20PR-L9

MAZDAAXELA 1500 SK16PR-E11

AZ-OFFROAD 660 IXU22CAZ-WAGON 660 IXU22CCAROL 660 IXU22CLAPUTA 660 IXU22CROADSTER 1800 SK16PR-F8SCRUM 660 IXU22CSPIANO 660 IXU22C

MITSUBISHIi 660 SXU22HDR8

DIAMANTE 2500 SK20PR-B8eK 660 SVK20RZ8LANCER EVOLUTION 2000 S22PR-A7

LANCER EVOLUTION 2000 VW22PAJERO 3000 SK20PR-A11PAJERO MINI 660 SXU22PR-A9TOWN BOX 660 SVK20RZ8

NISSANBLUEBIRD SYLPHY 1500,2000 FXE20HE11CUBE 1500 FXE20HE11LAFESTA 2000 FXE20HE11

LATIO 1500 FXE20HE11LATIO 1800 FXE20HR11MARCH 1500 FXE20HE11NOTE 1500 FXE20HE11

OTTI 660 SVK20RZ8SERENA 2000 FXE20HR11TIIDA 1500 FXE20HE11TIIDA 1800 FXE20HR11

WINGROAD 1500 FXE20HE11WINGROAD 1800 FXE20HR11

SUZUKIAERIO 1500 .SK16PR-A11

ALTO LAPIN 660 IXU22CALTO / WORKS 660 IXU22C

CHEVROLET CRUZE 1300 .SK16PR-A11EVERY WAGON 660 IXU22C

JIMNY 660 IXU22CJIMNY SIERRA / WIDE 1300 .SK16PR-A11

MR WAGON 660 IXU22CSWIFT 1300 .SK16PR-A11

TWIN 660 IXU22CWAGON R 660 IXU22C

WAGON R SOLIO 1300 .SK16PR-A11

DAIHATSUATRAI WAGON 660 SVK20RZ11BeGO 1500 SXU22PR9

BOON 1000 SK20HR11BOON 1300 SVK20RZ11COO 1300 SXU22PR9

COPEN 660 SVK20RZ8DELTA 4100 SK20R5-G

HIJET CARGO 660 SVK20RZ11MAX 660 SVK20RZ11

MIRA 660 SVK20RZ11MOVE LATTE 660 SK20R11

MOVE / CUSTOM 660 SVK20RZ11NAKED 660 SVK20RZ11

OPTI / CLASSIC 660 SVK20RZ11TERIOS 1300 SVK20RZ8

TERIOS 660 SVK20RZ11YRV 1300 SVK20RZ8

BuickRainier 5300 41-985

CadillacCTS-V 5700 41-985

Escalada 6000 41-985

ChevroletAvalanche 5300 41-985

Corvette 6000 41-985Express 4800,5000 41-985Silverado 4800,5000 41-985

SSR 6000 41-985Suburban 5300,6000 41-985

Tahoe 4800,5000 41-985TrailBlazer 5300 41-985

FORDFALCON 4000 VW16R-A13

GMCEnvoy 5300 41-985

Hummer H2 6000 41-985Savana 4800,5000 41-985

Sierra 4800,5000 41-985Yukon 4800,5000 41-985

HYUNDAISONATA SK16PR-A11

PontiacGTO 6000 41-985

Vibe 1800 SK16R11Vibe GT 1800 SK20R11

SaturnVUE 3500 SKJ16DR-M11

MOTORCYCLES

HONDACRF250X(IMPORT) VUH24D

CRF250R(4ST) VUH24DCRF450R(4ST) VK24PRZ11

CBR600F(Import) IUH27DCBR600F4i IUH27D

CBR600FS(Import) IUH27DCBR600RR VUH24D

CBR600RR(Import) VUH27DCBR600RR(Import) VUH27ES

VER VNH24ZVER / ABS VNH27Z

CBR900RR(Import) IUH27DCBR929RR(Import) IUH27D

CBR954RR VUH24DCBR954RR(Import) VUH27D

RC51(RVT1000R)(Import) IK27C11VTR1000SP-1(Import) IK27C11

VTR1000SP-2(Import) VK27PRZ11CBR1000RR VUH27ES

CBR1100XX VUH27DVTX VK20PRZ11

MONDIAIPIEGA IK27C11

YAMAHAYZF-R1(Import) IU27D

KART, MARINE & BUGGY

ROTAXRACING KART IW27

HONDAOUTBOARD BF series VKJ20RZ-M11

OUTBOARD BF series SKJ20DR-M11TRX500(QUAD) VX22BC

TRX650FA VK16PRZ11

SparkPOINT 1 IgnitionPOINT 2

Built-in, Highly Reliable Resistor

0.4 mm Diameter Ultra-fine Iridium Center Electrode

Highly Corrosion Resistant, BurnishedNickel Plating

Specifications Include Terminal

The finer the center electrode, the higher performance it provides!The finer the center electrode, the higher performance it provides!

Dramatically improves engine power, quick response, and durability! So, just what is ?By mounting a new iridium alloy (a precious metal with a very high melting point) on the tip of the center electrode, we perfected an ultra-fine diameter: 0.4 mm. This ultra-fine electrode greatly reduces the necessary spark voltage and improves ignitability, extending engine power and acceleration response at high speeds.(Melting points: Iridium: 2,454°C; Platinum: 1,769°C)

Document title: Development of New Iridium Alloy for Spark Plug ElectrodesInvention of an iridium spark plug with high performance and long life

Award winners: Hironori Osamura (Senior Manager of Engineering Center 1, DENSO Ceramic Engineering Department);Nobuo Abe (Manager of Engineering Center 1, DENSO Ceramic Engineering Department); in addition to two other members

Received the “Arch T. Colwell Merit Award” in March 2001 from the Society of Automotive Engineers (SAE), the world’s authority, and awarded the “President’s Prize” by the Japan Patent Attorneys Association in June 2001.

Dramatically improves engine power, quick response, and durability! So, just what is ?

Iridium Alloy Center Electrode0.4mm dia.Iridium Alloy Center Electrode0.4mm dia.

By mounting a new iridium alloy (a precious metal with a very high melting point) on the tip of the center electrode, we perfected an ultra-fine diameter: 0.4 mm. This ultra-fine electrode greatly reduces the necessary spark voltage and improves ignitability, extending engine power and acceleration response at high speeds.(Melting points: Iridium: 2,454°C; Platinum: 1,769°C)

A terminal nut is attached that fits with most of the world’s spark plug cables. Please remove the nut for installations that do not require one. (Excluding IWM & IK-G types)

All plugs include a highly reliable, 5,000 Ω monolithic resistor specification to reduce electromagnetic noise that may affect electronic devices. (For all plug types)

The process used to mount the iridium tip is a highly reliable “360 Laser Welding” process that is able to withstand all kinds of driving conditions. (For all plug types)

Using a new iridium alloy with a very high melting point, the tip of the electrode can be made very fine. This enables the reduction of voltage necessary to cause the spark, and greatly improves ignitability. Moreover, the special iridium alloy used was developed by DENSO with the following patented processes (for all types): Japan (2877035, 2921524, 3000955), U.K. (2302367), U.S.A. (5977695, 6078129, 6093071, 6094000, 6262522), People’s Republic of China (961022841), Republic of Korea (0292083).

Highly corrosion resistant, burnished nickel platingThe plug housing is plated with burnished nickel, the same as plugs used for racing. It is highly resistant to corrosion and rust even while touring in continually rainy weather and during motocross events. (Excluding low-heat range types)

(excluding embedded electrode types)

Flame kernel

SeriesSeries

Document title: Development of New Iridium Alloy for Spark Plug ElectrodesInvention of an iridium spark plug with high performance and long life

Award winners: Hironori Osamura (Senior Manager of Engineering Center 1, DENSO Ceramic Engineering Department);Nobuo Abe (Manager of Engineering Center 1, DENSO Ceramic Engineering Department); in addition to two other members

Received the “Arch T. Colwell Merit Award” in March 2001 from the Society of Automotive Engineers (SAE), the world’s authority, and awarded the “President’s Prize” by the Japan Patent Attorneys Association in June 2001.

The worldfinest

diameter!

The worldfinest

diameter!

A finer diameter centerelectrode generates

a more stable spark!Stable combustion

0.4 mm diameter

(Example: Platinum plug)1.1 mm diameter

0.4 mm diameter

(Example: Platinum plug)1.1 mm diameter

Example:Lightning isattracted to

pointedobjects.

The photographis a comparison ofhow combustion

spreads withgeneral-use plugs

and .

The finer-center electrode absorbs lessheat energy!

Instantaneous combustion

Large quenching (cooling) effect

Smallquenching effect

Regular plug[*1]

0

1

2

3

4

Flame kernel

[*1] Comparison with 2.5 mm diameter electrode

Time(ms)


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Improved acceleration!Improved

acceleration!

Economical and long lastingEconomical and long lasting

On the circuit is where it makes the difference.On the circuit is where it

makes the difference.

Next Generation High Performance

Plugs for Taxi

Next Generation High Performance

Plugs for Taxi

R

For highest performance and racing

Specially tuned for racingImproved durability ( ) Improved mileage

For long distance and heavy-use driversFor drivers that care about mileage

Improved acceleration Improved power Improved mileage

For those desiring to move their driving performance up a notch

100,000 km inpassenger vehicles


SPORTS

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15


U-Groove Ground Electrode

360 Laser Welding

0.4 mm Diameter Ultra-fine Iridium Center Electrode

Highly Corrosion Resistant, Burnished Nickel Plating

Specifications Include Terminal

Improved acceleration!Improved

acceleration!

The U-shaped groove on the ground electrode insures that the inside surface

area is large enough to generate the flame kernel. This shape enables lower voltage needed to cause the spark and results in excellent ignitability without increasing the size of the spark gap. (excluding IUF27A, IUF31A, IU24A and IU31A)

A terminal nut is attached that fits with most of the world’s spark plug cables. Please remove the nut for installations that do not require one. (The terminal nuts on the IWM and IK-G types are solid parts and cannot be removed.)

All plugs include a highly reliable, 5,000 ohm monolithic resistor specification to reduce electromagnetic noise that may affect electronic devices. (For all plug types)

The process used to mount the iridium tip is a highly reliable “All-around Laser Welding” process that is able to withstand all kinds of driving conditions. (For all plug types)

The plug housing is plated with burnished nickel, the same as plugs used for racing. It is highly resistant to corrosion and rust even while touring in continually rainy weather and during motocross events. (Low-heat range types excluded)

Insulator ProjectionThe projection of the insulator is optimally designed based on each plug's

thermal value. This corresponds to requirements unique to thermal value, such as self-cleaning ability at lower thermal values, and heat resistance at higher thermal values. (For all plug types)

Projected Center Electrode

In order to improve ignitability, the center electrode protrudes more than with conventional type plugs. This improves both acceleration response time and performance.(Only with: IU31, IUH24, IUH27, IX22, IX24, IX27, IUF22, IUF24, IWF22, IWF24, IWF27, IW24, IW27, IW29, IW31, and IW34)

Using a new iridium alloy with a very high melting point, the tip of the electrode can be made

very fine. This enables the reduction of voltage necessary to cause the spark, and greatly improves ignitability. Moreover, the special iridium alloy used was developed by DENSO with the following patented processes (for all types): Japan (2877035, 2921524, 3000955), U.K. (2302367), U.S.A. (5977695, 6078129, 6093071, 6094000, 6262522), People's Republic of China (961022841), Republic of Korea (0292083).

Taper-cut Ground ElectrodeThe tip of the ground electrode is cut to a fine taper to reduce the adverse effects of quenching, which greatly improves fuel ignitability. Also, because of the streamlined, taper-cut shape, the fuel-air

mixture spreads more evenly in the gap, resulting in steady, reliable igniting of combustion.(excluding IUF27A, IUF31A, IU24A, IU27A, IU31A, IY24, IY27 & IY31)

A next-generation plug that draws out engine evolution with a high-performance spark.

Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!

The world’s finest diameter0.4mm

with an iridium center electrode

(as of May 2006)

1

2

3

4

5

3

1

4

2

5a 0.7 sec difference

0.4mm IRIDIUM

TAPERED CUT

0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!

5kΩ


SPORTS

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16

Note: Mileage measured using a chassis dynamo; actual driving results under normal conditions may vary.

I want the next level of response and power for my baby.

is recommended for the following kind of user.

For drivers that care about mileage.It’s the car that I drive every day, so I want less fuel consumption.

By using a 0.4mm diameter iridium alloy center electrode and a special ground electrode, realizes spark performance unseen until now. It steadily gives a high level of response under a variety of driving conditions. The result? Increased acceleration and torque compared to regular plugs.

has a low required voltage and a high ignitability, resulting in less misfiring and no spark, the outcome being a dramatic improvement in combustion. Engine output is thus increased. The findings of a bench test using a motorcycle engine to show the improved combustion from is shown on the below. Compared to normal plugs, a 0.5ps (1.4%) improvement is seen in output at 110 km/h.

best demonstrates its performance improvement during acceleration. has a 0.4 mm diameter iridium center electrode and a specially shaped ground electrode. These features combine to achieve higher ignitability and require lower spark voltage than ever before. This enables high-response driving with fewer misfires than under higher required voltage spark conditions, and fewer misfires when ignitability is difficult. As a result, acceleration improves in comparison with normal plugs.

Get more power with an optimal fuel cycle. Increased response and acceleration performance.

To increase ignitability, the important point is to let the flame kernel caused by the spark to grow to a large size. Normally, this can be accomplishing by widening the spark gap, however this causes spark voltage to increase, which has the opposite effect. uses DENSO very own U-Groove ground electrode to realize a superb ignitability while maintaining spark voltage at low levels.

With DENSO’s very own U-Groove ground electrode for better spark performance.

The 0.4mm center electrode increases output under various driving conditions.

Even during idling ignition is assured, with less fuel consumption.

If you use your car on a daily basis, you may be concerned about fuel consumption. is one solution.

Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!Revving up plug performance with 0.4 mm!

For drivers that care about performance.

×1000r/min01

23 4 5

67

8

×1000r/min01

23 4 5

67

8

×1000r/min01

23 4 5

67

8

31.6

32.2

32.4

31.8

32

32.6

Outp

ut (ps)

Vehicle: 250 cc (2-cycle, water-cooled, V2 cylinders)Conditions: FULL 100 km/h

(0.4mm Dia.)DENSO prototype

(0.8 mm Dia.)Normal-use DENSO plug

(2.5 mm Dia.)

32.3932.32

31.97

Data: In-Company Comparison

W20FS-U①

40.5 41 41.5 42 42.5 43 43.5 44 44.5（km/l）

Fuel average

Mileage Comparison TestTesting vehicle: Honda DIO (2-cycle, single-cylinder, air-cooled, 50 cc)Testing conditions: speed, 30 km/h; F/W 120 kg; measurement time, 10 minutes; cooling breeze, 30 km/h

41.79

W20FS-U② 41.70

IWF22① 43.30

IWF22② 44.07


Data: In-Company Comparison25

90 100 110

30

35

Ho

rse Po

wer (p

s)

Speed (km/h)

Normal plug

Vehicle: 250 cc (2-cycle, water-cooled, V2 cylinders)Conditions: FULL 90 to 110 km/h

Plug110

(km/h)

Normalplug

Horse Power (ps)31 32

1.4%UP

31.06

31.50


50

100

150

Sp

eed (km

/h)

Time (sec)

Normal pluga 0.7 sec differencea 0.7 sec difference

Vehicle: 250 cc (2-cycle, water-cooled, V2 cylinders)Conditions: Fixed in 6th gear, full throttle acceleration

from 50 km/h with automatic driving device

A 6 m difference

0.4 dia.

2.5 dia.Normal

plug

Plug

CenterElectrode

Dia.(mm) 790 800

Mileage (m) Good

810

805

799

The power produced by the 0.4mm dia. iridium center electrode is unmatched by other plugs. The graph below compares the resulting power when is installed compared to other high performance plugs. Using a 0.4mm dia. fine center electrode, there is more power compared to 0.8mm and 2.5 mm dia. plugs. This is what makes the difference in acceleration and in your lap time.

The good ignitability from the fine electrode (0.4 mm) of draws out much more performance from the engine. Comparing a normal plug (W20FS-U) with an (IWF22) on a 2-cycle 50cc engine, fuel consumption improved from 41.74 km/L 43.69 km/L, an improvement of about 5%.

0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!0.4mm Iridium,only at DENSO!

Spark gap(small)

U-Groove ground electrodes

Spark gap(large)

Regular ground electrodes

Flame kernel

Normal plug

Improved Horse Power (1)

Ignitability That’s a Cut Above

×1000r/min01

23 4 5

67

8Improved Acceleration

×1000r/min01

23 4 5

67

8Improved Horse Power (2) Improved Fuel Mileage

1.4% up!

1.4% up! 5%

up!

6m longer!0.7sec

faster!


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17


SPORTS

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PART

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&USA

lineup

IQ16. IQ20. IQ22. IQ24.IQ27. IQ31. IQ34

IQ series

Mainly used for cars. 14 mm dia.L19 mm

length type. IQ22 and above are for

tuned engines, with aspark gap of 0.8 mm.

VQ16, VQ20, andVQ22 are also on sale.

IK16. IK20.IK22. IK24. IK27. IK31. IK34.IK16G. IK20G. IK22G. IK16L. IK20L

IK series

Mainly used for cars.ISO type.

14 mm dia.L19 mmlength type.

IK22 and above are fortuned engines, with aspark gap of 0.8 mm.

IK16G, IK20G, andIK22G have a solid,stainless steel gasket(mainly used withHonda engines).

VK16, VK20, and VK22are also on sale at thesame time.

IKm L is extended type(spark position 5 mm)

IW16. IW20. IW22. IW24. IW27. IW29. IW31. IW34

IW series

IWF16. IWF20. IWF22. IWF24. IWF27

IWF series

14 mm dia L12.7 mmlength short reachtype.

IWF27 utilizes the heatresistance of theiridium electrode toextend the sparkposition 0.5 mm (1.0 1.5 mm)

Harnessing the lowrequired voltage of the0.4mm dia. iridium,the gap is wider thanin standard types (0.7 0.8 mm).Ignitability is increasedeven further.

IT16. IT20. IT22. IT24. IT27

IT series

14 mm dia.L17.5 mmlength tapered seattype.

For use with GM, Ford,Citroen, Jaguar,Peugeot, Volvo,Mercedes- Benz,Lancia, Renault, Audi,and Mazda.

VT16, VT20 are alsoon sale.

ITF16. ITF20. ITF22. ITF24. ITF27

ITF series

14 mm dia.L11.2 mmlength tapered seattype.

For use with GM andFord.

ITL16. ITL20

ITL series

14 mm dia.L25.0 mmlength tapered seat,long reach type.

Designed so that thehead of the plug is 6mm higher than in theITV.

Use with Chrysler’s PTCruiser, Voyager,Dodge, Magnum for2005 model years andlater.

IXU22. IXU24. IXU27

IXU seriesIX22. IX24. IX27

IX series

IKH16. IKH20. IKH22IKH24. IKH27

IKH series

14 mm dia.26.5 mmlength long reachtype.

For Subaru 3 Liter,Nissan, Peugeot,Citroen, and YamahaMarine.

VKH16, VKH20, andVKH22 are also onsale.

ITV16. ITV20. ITV22. ITV24.ITV27

ITV series

14 mm dia.L25.0 mmlength tapered seat,long reach type.

For the Ford Focus,Mondeo, Escape,Chevrolet Blazer andMazda Tribute.

IWM24. IWM27. IWM31

IWM series

This type has a gasketface height shortenedby approximately 10mm from the IW Type.

Theversion of the IWM01-m Iridium Racingplugs.

Sold as street-useplugs for 2-cycle250cc sports bikes.

For Honda NSR250,Yamaha TZ250R,Suzuki RGV250Γ(Gamma), ApriliaRS250, KTM260, 300,and 380 (’99 andlater).

Can also be used forwater cooled kartengines.

14 mm dia.L19 mmlength fully threadedtype.

IW16 to 22 arefocused on ignitabilitywith a 1.5 mmprojection, whereasIW24 to 34 arefocused on heatresistance with aprojection of -1.5 mm.

The spark position ofIW24 to 34 isprojected 0.5mmcompared to normal(1.0 1.5 mm).

Equipped with 0.4 mmdiameter iridiumcenter electrode forimproved ignitability.

VW16, VW20, andVW22 are also on sale.

26.5mm

14mm 14

mm

14mm

14mm

14mm

14mm

14mm

14mm

14mm14

mm

19mm

50.5mm

19mm

53mm

19mm

50 mm

25mm

56 mm

25mm

19mm

12.7mm

11.2mm

17.5mm

16mm 18mm

19mm

19mm


The insulator is fullyprojected (1.5 mm),creating a wide heatrange and greaterignitability.

16 mm Hex For use with small

cars and importedmotorcycles such asDucati.

VXU22, VXU24 arealso on sale.


Using the high heatresistance of theiridium electrode, thespark position isprojected 0.4 mmmore than instandard types. (1.6 2.0 mm)

Harnessing the lowrequired voltage ofthe 0.4mm dia.iridium the gap iswider than in thestandard types (0.7 0.8 mm). A further increase inignitability.

18 mm Hex

12mm

12mm

18


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① SparkA spark in thelocation mostconducive tosparking.

② The Flame Kernel FormsA portion of thefuel-air mix isactivated fromthe dischargedenergy, and asmall flamekernel forms.

③ The Flame kernel GrowsThe flamekernel growsdespite havingenergy suckedaway by thecenter andgroundelectrodes.

④ IgnitionThe flamekernel grows,accelerating,until it spreadsexplosively incombustion.

Electrodes have a quenching (cooling) affect (where the heat of the ignitedflame kernel is taken away by the electrode). This cooling affect is greaterwith larger electrodes, sometimes causing the ignition to stop short of thestage in Figure 4. To improve ignitability, the contact area between theelectrode and the flame kernel must be reduced. Improved ignitability iswhy electrodes have been made fine as possible.

Plug electrodes conventionally have used nickel and platinum. These were not pure metals,but alloys containing other metals. Depending on the composition of the alloy, the matrixmaterial’s properties can be maximized. Using the same approach, iridium is alloyed withrhodium. The rhodium layer covers the iridium, improving the properties of the iridium. Thisiridium/rhodium technology was recognized by the Patent Offices of Japan and the UK, andin January 1999, a patent was granted in each respective country. (Patent Number - Japan:2877035, UK: 2302367). Because DENSO had this patented technology, DENSO was ableto make dia. of the iridium down to 0.4mm. The most important things for plug performanceare ignitability and spark ability. To make the electrode as fine as possible is the goal ofspark plug manufacturers worldwide, and DENSO has taken the lead, succeeding thecommercializing the 0.4mm dia. center electrode plug.

Melting Point

2500

2000

1500

1000

500

Iridium

Nickel

Platinum

Gold

Silver

Required voltage

The finer the electrode, the more concentrated the electrical potentialand the stronger the electrical field strength becomes, leading to a lowerrequired voltage. This results in a steady combustion in a variety ofdriving conditions, and better starting and acceleration for the engine.

Normal

Weak Strong

The Secret behind DENSO’s Iridium Patent! A Pattern from Spark to Ignition.

IX22B. IX24B. IX27B

IX-B series


Compared to the IXtype, the insulatorprojection is extended0.9 mm (0.6 1.5mm), resulting in awider heat range.

The spark position isprojected 0.8 mmmore than the IX type.(2.0 2.8 mm)

18 mm Hex

IU20. IU22. IU24. IU27. IU31

IU series


Harnessing the lowrequired voltage of the0.4 mm iridium centerelectrode, the sparkgap is wider than innormal type. A furtherincrease in ignitability.(0.8 0.9mm)

For motorcycles suchas Yamaha andKawasaki, also forFerarri, Maserati, andAlfa Romeo.

IXG24. IXG27

IXG series

The Iridium Powerversions of the 2 mmshroud type plugs(X24/27GPU) used byHonda.

Applicable toCB400SS. An expansion ofapplications isplanned.

Applicable to HondaCB400SS, XR400RR,CL400/RS, XLR250R,CBX250S, FTR250,CBX400F, XR250R.

IU24A. IU27A. IU31A

IU-A series

10 mm dia.L19 mmlength fully threadedslant ground electrodetype.

Harnessing the lowrequired voltage of the0.4 mm dia. iridium,the gap is wider thanin normal type (0.7 0.9 mm). Ignitability isgreatly increased.

By making this asingle electrode, thespark location isstabilized compared toin normal types(double groundelectrode), securingan ideal combustioncondition.

IUH24. IUH27

IUH series

10 mm dia.L19 mmlength half-threadedtype.

Using the high heatresistance of theiridium electrode, thespark position isextended 0.4 mmcompared to standardtypes (1.6 2.0 mm)

Use only with Honda

IUF22. IUF24. IUF14-UB

IUF series

10 mm dia.L12.7 mmlength short reachtype.

Using the high heatresistance of theiridium, the sparkposition is extended0.4 mm compared tostandard types (1.6 2.0 mm)

Harnessing the lowrequired voltage of the0.4 mm dia. iridium,the spark gap is widerthan in normal types(0.7 0.8 mm).Ignitability is greatlyincreased.

IUF27A. IUF31A

IUF-A series

10 mm dia.L12.7 mmlength short type.

Ideal for Gorilla/Monkey Racing.

The ground electrodehas a slant shape,reducing the thermalstress on it.

IY24. IY27. IY31

IY series

8 mm dia.L19 mmlength tapered seat,half thread type.

The world’s first 8 mmthread diameteriridium plug.

Can be used withHonda Smart Dio (’04-), VFR400,RVF400, KitacoMonkey Head, andNR750.

19mm

22mm

19mm

6.3mm

12.7mm

12.7mm

12.7mm

19mm 19

mm

19mm

Slant electrode

Slant Electrode

What’sIridium?

12mm 12

mm10mm

8mm

10mm

10mm

10mm 10mm

19


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&USA

20

BARCODE DENSO P/N

JIS 14 19 16 1.1 1.5 3.0 5.5 RC 5 I01 0 42511 05301 4 067700-8700 0 42511 02301 7 100676-3380

JIS 14 19 16 1.1 1.5 3.0 5.5 RC 5 I02 0 42511 05302 1 067700-8710 0 42511 02302 4 100676-3390

JIS 14 19 16 0.8 1.5 3.0 5.2 RC 5 I13 0 42511 05313 7 067700-8480 0 42511 02313 0 100676-3480

JIS 14 19 16 0.8 1.5 3.0 5.2 RC 5 I14 0 42511 05314 4 067700-8490 0 42511 02314 7 100676-3490

JIS 14 19 16 0.8 1.5 3.0 5.2 RC 5 I15 0 42511 05315 1 067700-8500 0 42511 02315 4 100676-3500

JIS 14 19 16 0.8 -0.5 1.0 3.2 RC 5 I23 0 42511 05323 6 067700-9230 0 42511 02323 9 100676-3520

JIS 14 19 16 0.8 -0.5 1.0 3.2 RC 5 I24 0 42511 05324 3 067700-9600 0 42511 02324 6 100676-3830

ISO 14 19 16 1.1 1.5 3.0 5.5 RC 5 I03 0 42511 05303 8 067700-8680 0 42511 02303 1 100676-3360

ISO 14 19 16 1.1 1.5 3.0 5.5 RC 5 I04 0 42511 05304 5 067700-8690 0 42511 02304 8 100676-3370

ISO 14 19 16 0.8 1.5 3.0 5.2 RC 5 I10 0 42511 05310 6 067700-8430 0 42511 02310 9 100676-3450

ISO 14 19 16 0.8 1.5 3.0 5.2 RC 5 I11 0 42511 05311 3 067700-8460 0 42511 02311 6 100676-3460

ISO 14 19 16 0.8 1.5 3.0 5.2 RC 5 I12 0 42511 05312 0 067700-8470 0 42511 02312 3 100676-3470

ISO 14 19 16 0.8 -0.5 1.0 3.2 RC 5 I21 0 42511 05321 2 067700-9220 0 42511 02321 5 100676-3510

ISO 14 19 16 0.8 -0.5 1.0 3.2 RC 5 I22 0 42511 05322 9 067700-9590 0 42511 02322 2 100676-3600

ISO,SUS GASKET 14 19 16 1.1 1.5 3.0 5.5 S 5 I51 0 42511 05351 9 267700-5610

ISO,SUS GASKET 14 19 16 1.1 1.5 3.0 5.5 S 5 I52 0 42511 05352 6 267700-5620

ISO,SUS GASKET 14 19 16 0.8 1.5 3.0 5.2 S 5 I48 0 42511 05348 9 267700-5660 0 42511 02348 2 100676-5350

ISO, EXTENDED 14 19 16 1.1 2.5 5.0 7.8 RC 5 I57 0 42511 05357 1 267700-5120

ISO, EXTENDED 14 19 16 1.1 2.5 5.0 7.8 RC 5 I58 0 42511 05358 8 267700-5130

Long Reach 26.5 mm 14 26.5 16 1.1 1.5 3.0 5.5 RC 5 I43 0 42511 05343 4 267700-3660 0 42511 02343 7 100676-5160

Long Reach 26.5 mm 14 26.5 16 1.1 1.5 3.0 5.5 RC 5 I44 0 42511 05344 1 267700-3670 0 42511 02344 4 100676-5140

Long Reach 26.5 mm 14 26.5 16 0.8 1.5 3.0 5.2 RC 5 I45 0 42511 05345 8 267700-2650 0 42511 02345 1 100676-5170

Long Reach 26.5 mm 14 26.5 16 0.8 1.5 3.0 5.2 RC 5 I46 0 42511 05346 5 267700-4280 0 42511 02346 8 100676-5180

Long Reach 26.5 mm 14 26.5 16 0.8 1.5 3.0 5.2 RC 5 I47 0 42511 05347 2 267700 4290 0 42511 02347 5 100676-5190

14 19 20.6 1.1 1.5 3.0 5.5 RC 5 I05 0 42511 05305 2 067700-8650 0 42511 02305 5 100676-3400

14 19 20.6 1.1 1.5 3.0 5.5 RC 5 I06 0 42511 05306 9 067700-8660 0 42511 02306 2 100676-3410

14 19 20.6 0.8 1.5 3.0 5.2 RC 5 I07 0 42511 05307 6 067700-8670 0 42511 02307 9 100676-3420

14 19 20.6 0.7 -0.5 1.5 3.6 RC 5 I16 0 42511 05316 8 067700-8890

14 19 20.6 0.7 -0.5 1.5 3.6 RC 5 I17 0 42511 05317 5 067700-8900

14 19 20.6 0.7 -0.5 1.5 3.6 RC 5 I18 0 42511 05318 2 067700-8910

14 19 20.6 0.7 -0.5 1.5 3.6 RC 5 I19 0 42511 05319 9 067700-8920

14 19 20.6 0.7 -0.5 1.5 3.6 RC 5 I20 0 42511 05320 5 067700-8930

INSULATOR COMPACT 14 19 20.6 0.8 -1.5 0.5 2.7 S 5 I91 0 42511 05391 5 267700-2890



14 12.7 20.6 0.8 1.5 3.0 5.2 R 5 I59 0 42511 05359 5 267700-5000

14 12.7 20.6 0.8 1.5 3.0 5.2 R 5 I78 0 42511 05378 6 267700-5010

14 12.7 20.6 0.8 -0.5 1.5 3.7 R 5 I79 0 42511 05379 3 067700-9410

14 12.7 20.6 0.8 -0.5 1.5 3.7 R 5 I80 0 42511 05380 9 067700-9420

14 12.7 20.6 0.8 -0.5 1.5 3.7 R 5 I81 0 42511 05381 6 067700-9430

Long-Reach (Tapered seat) insulator length: 50 mm 14 25 16 1.1 1.5 3.0 5.5 RC 5 I38 0 42511 05338 0 267700-3700 0 42511 02338 3 100676-5200

Long-Reach (Tapered seat) insulator length: 50 mm 14 25 16 1.1 1.5 3.0 5.5 RC 5 I39 0 42511 05339 7 267700-3710 0 42511 02339 0 100676-5210

Long-Reach (Tapered seat) insulator length: 50 mm 14 25 16 0.8 1.5 3.0 5.2 RC 5 I40 0 42511 05340 3 267700-2500

Long-Reach (Tapered seat) insulator length: 50 mm 14 25 16 0.8 -0.5 1.0 3.2 RC 5 I41 0 42511 05341 0 267700-2510

Long-Reach (Tapered seat) insulator length: 50 mm 14 25 16 0.8 -0.5 1.0 3.2 RC 5 I42 0 42511 05342 7 267700-2520



TAPER SEAT 14 17.5 16 1.1 1.5 3.0 5.5 RC 5 I25 0 42511 05325 0 267700-0610 0 42511 02325 3 100676-3610

TAPER SEAT 14 17.5 16 1.1 1.5 3.0 5.5 RC 5 I26 0 42511 05326 7 267700-0620 0 42511 02326 0 100676-3620

TAPER SEAT 14 17.5 16 0.8 1.5 3.0 5.2 RC 5 I27 0 42511 05327 4 267700-0630 0 42511 02327 7 100676-3630

TAPER SEAT 14 17.5 16 0.8 -0.5 1.0 3.2 RC 5 I28 0 42511 05328 1 267700-0640 0 42511 02328 4 100676-3640

TAPER SEAT 14 17.5 16 0.8 -0.5 1.0 3.2 RC 5 I29 0 42511 05329 8 267700-0650 0 42511 02329 1 100676-3650

TAPER SEAT 14 11.2 16 1.1 1.5 3.0 5.5 RC 5 I30 0 42511 05330 4 267700-0660 0 42511 02330 7 100676-3660

TAPER SEAT 14 11.2 16 1.1 1.5 3.0 5.5 RC 5 I31 0 42511 05331 1 267700-0670 0 42511 02331 4 100676-3670

TAPER SEAT 14 11.2 16 0.8 1.5 3.0 5.2 RC 5 I32 0 42511 05332 8 267700-0680 0 42511 02332 1 100676-3680

TAPER SEAT 14 11.2 16 0.8 -0.5 1.0 3.2 RC 5 I33 0 42511 05333 5 267700-0690 0 42511 02333 8 100676-3690

TAPER SEAT 14 11.2 16 0.8 -0.5 1.0 3.2 RC 5 I34 0 42511 05334 2 267700-0700 0 42511 02334 5 100676-3700

12 19 16 0.9 1.3 2.8 5.0 RC 5 I08 0 42511 05308 3 067700-8721 0 42511 02308 6 100676-3430

12 19 16 0.9 1.3 2.8 5.0 RC 5 I09 0 42511 05309 0 067700-8731 0 42511 02309 3 100676-3440

IQ16IQ20IQ22IQ24IQ27IQ31IQ34IK16IK20IK22IK24IK27IK31IK34IK16GIK20GIK22GIK16LIK20LIKH16IKH20IKH22IKH24IKH27IW16IW20IW22IW24IW27IW29IW31IW34IWM24IWM27IWM31IWF16IWF20IWF22IWF24IWF27ITV16ITV20ITV22ITV24ITV27ITL16ITL20IT16IT20IT22IT24IT27ITF16ITF20ITF22ITF24ITF27IXU22IXU24

BARCODE DENSO P/N

ONE PC BOX 2pcs BLISTER PACKSPEC

DIA

.

(mm)

RE

AC

H

(mm)

HE

X

(mm)

GA

P

(mm)

PROJECIO

N

SP

AR

KP

OS

ITIO

N

SPARKELECTRODE

HEIGHT

TE

RM

INA

LS

HA

PE

(mm) (mm) (mm)

RES

ISTO

R

(kΩ)

No

.

TYPE

Specifications

MOTOR

SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

21

0.4mm diameter IRIDIUM PLUG

Spark gap example..............For a 1.1 mm gap, set from 1.0 to 1.1 mm.Insulator projection ..............Length from edge of side housing to top of insulator. The plus (+) direction is the distance from the edge to the piston head.Spark position ......................Length from edge of side housing to top of center electrode. The plus (+) direction is the distance from the edge to the piston head.Ground electrode height ......Length from edge of side housing to top of ground electrode. The plus (+) direction is the distance from the edge to the piston head.Terminal shapes ..................S: solid terminal, R: removable, RC: crimped nut, T: threadedNote: Please purchase plugs equipped as original parts at stores that sell original parts.

12 19 16 0.9 1.3 2.8 5.0 RC 5 I37 0 42511 05337 3 067700-8601 0 42511 02337 6 100676-3820

12 19 18 0.8 0.6 2.8 4.1 R 5 I71 0 42511 05371 7 067700-9350

12 19 18 0.8 0.6 2.0 4.1 R 5 I72 0 42511 05376 4 067700-9360

12 19 18 0.8 0.6 2.8 4.1 R 5 I73 0 42511 05373 1 067700-9370

12 19 18 0.9 1.5 2.8 5.0 R 5 I75 0 42511 05375 5 067700-9380

12 19 18 0.9 1.5 2.8 5.0 R 5 I76 0 42511 05376 2 067700-9390

12 19 18 0.9 1.5 2.8 5.0 R 5 I77 0 42511 05377 9 067700-9400

SHROUD 12 22 18 0.7 0.7 2.0 4.1 R 5 I94 0 42511 05394 6 267700-2920

SHROUD 12 22 18 0.7 0.7 2.0 4.1 R 5 I95 0 42511 05395 3 267700-2930

10 19 16 0.9 -0.5 0.7 2.6 R 5 I60 0 42511 05360 1 267700-5020

10 19 16 0.9 -0.5 0.7 2.6 R 5 I61 0 42511 05361 8 067700-9260

10 19 16 0.9 -0.5 0.7 2.6 R 5 I62 0 42511 05362 5 067700-9270

10 19 16 0.9 -0.5 0.7 2.6 R 5 I63 0 42511 05363 2 067700-9280

10 19 16 0.9 -0.5 0.7 2.6 R 5 I64 0 42511 05364 9 067700-9290

10 19 16 0.9 -0.5 1.0 2.9 R 5 I65 0 42511 05365 6 067700-9300

10 19 16 0.9 -0.5 1.0 2.9 R 5 I66 0 42511 05366 3 067700-9310

10 19 16 0.9 -0.5 1.0 2.9 R 5 I67 0 42511 05367 0 067700-9320

HALF THREAD 10 19 16 0.9 0.6 2.0 3.9 R 5 I68 0 42511 05368 7 067700-9330

HALF THREAD 10 19 16 0.9 0.6 2.0 3.9 R 5 I69 0 42511 05369 4 067700-9340

10 12.7 16 0.8 0.6 2.0 3.8 R 5 I83 0 42511 05383 0 067700-9480

10 12.7 16 0.8 0.6 2.0 3.8 R 5 I84 0 42511 05384 7 067700-9490

10 12.7 16 0.9 -0.5 1.0 2.9 R 5 I85 0 42511 05385 4 067700-9700

10 12.7 16 0.9 -0.5 1.0 2.9 R 5 I86 0 42511 05386 1 067700-9710

HALF THREAD 8 19 13 0.7 0.6 1.4 2.9 R 5 I100 0 42511 05400 4 267700-4490

HALF THREAD 8 19 13 0.7 0.6 1.4 2.9 R 5 I101 0 42511 05401 1 267700-4500

HALF THREAD 8 19 13 0.7 -0.5 0.5 2.0 R 5 I102 0 42511 05402 8 267700-4510

IXU27IX22IX24IX27IX22BIX24BIX27BIXG24IXG27IU20IU22IU24IU27IU31IU24AIU27AIU31AIUH24IUH27IUF22IUF24IUF27AIUF31AIY24IY27IY31

ISO 14 19 16 1.1 1.5 3.0 5.7 S 5 I35 0 42511 05335 9 067700-9550

ISO 14 19 16 1.1 0.5 2.0 4.7 S 5 I36 0 42511 05336 6 067700-9520

ISO Ground Elec. Pt. & Taper-cut 14 19 16 1.1 1.5 3.0 5.7 S 5 V28 0 42511 05628 2 267700-1840

ISO Ground Elec. Pt. & TAPERCUT 14 19 16 1.1 1.5 3.0 5.7 S 5 V15 0 42511 05615 2 267700-1850





ISO Ground Elec. Pt. & TAPERCUT 14 19 16 0.8 1.5 3.5 5.7 S 5 － 067700-9740

ISO Ground Elec. Pt. & TAPERCUT 14 19 16 1.1 1.5 3.5 6.0 S 5 － 067700-8620

Ground Elec. Pt. & TAPERCUT 14 19 20.6 1.3 2.5 4.0 6.9 S 5 － 267700-1640

Ground Elec. Pt. 12 19 18 0.9 1.5 2.8 5.0 T 5 V34 0 42511 05634 3 067700-9830

Ground Elec. Pt. 12 19 18 0.9 1.5 2.8 5.0 T 5 V14 0 42511 05614 5 067700-9720

No U-Groove 12 19 16 0.8 1.3 2.8 4.9 S 5 － 267700-5170

10 19 16 0.9 0.5 1.8 3.8 T 5 I90 0 42511 05390 8 267700-0850

HALF THREAD 10 19 16 0.9 0.6 2.0 4.0 T 5 I87 0 42511 05387 8 067700-9560

HALF THREAD 10 19 16 0.9 0.6 2.0 4.0 T 5 I88 0 42511 05388 5 067700-9570

HALF THREAD, Ground Elec. Pt. & TAPERCUT 10 19 16 0.9 0.6 2.0 4.0 T 5 V26 0 42511 05626 8 267700-2011

HALF THREAD, Ground Elec. Pt. & TAPERCUT 10 19 16 0.9 0.6 2.0 4.0 T 5 V27 0 42511 05627 5 267700-1931

HALF THREAD, Ground Elec. Pt. & TAPERCUT, SUSGASKET 10 19 16 0.9 0.6 2.0 4.0 T 5

HALF THREAD, Ground Elec. Pt. & TAPERCUT 10 19 16 0.9 0.6 2.0 4.0 S 5 V32 0 42511 05632 9 267700-2060

HALF THREAD, Ground Elec. Pt. & TAPERCUT 10 19 16 0.9 0.6 2.0 4.0 S 5 V31 0 42511 05631 2 267700-2070

10 12.7 16 0.7 0.6 1.6 3.3 S 5 I89 0 42511 05389 2 267700-0540

IK24C11IK27C11VK16PR-Z11VK20PR-Z11VK22PR-Z11VK24PR-Z11VK27PR-Z11VKJ20RZ-M11SVK20RZ8SVK20RZ11VW16R-A13VX20BCVX22BCIXU22C・IU27DIUH24DIUH27DVUH24D・VUH27D・VUH27ESVNH24ZVNH27ZIUF14-UB

BARCODE DENSO P/NBARCODE DENSO P/N


DIA

.

(mm)

RE

AC

H

(mm)

HE

X

(mm)

GA

P

(mm)

PROJECIO

N

SP

AR

KP

OS

ITIO

N

SPARKELECTRODE

HEIGHT

TE

RM

INA

LS

HA

PE

(mm) (mm) (mm)

RES

ISTO

R

(kΩ)

No

.

TYPE

BARCODE DENSO P/N

IRIDIUM ONE PC BOXSPEC

DIA

.

(mm)

RE

AC

H

(mm)

HE

X

(mm)

GA

P

(mm)

PROJECIO

N

SP

AR

KP

OS

ITIO

N

SPARKELECTRODE

HEIGHT

TE

RM

INA

LS

HA

PE

(mm) (mm) (mm)

RES

ISTO

R

(kΩ)

No

.

TYPE


　 0.4 mm Diameter Ultra-fine Iridium Center Electrode

Economical and long lasting!Economical

and long lasting!

All specification types include an embedded, highly reliable, monolithic resistor to eliminate electromagnetic noise interference from all kinds of electronic devices.

The ground electrode has a platinum tip, from DENSO’s experience with platinum plugs. This greatly moderates electrode wear and insures high durability.

Using DENSO’s exclusive iridium alloy having a very high melting point, the tip of the center electrode can be shaped very thin and fine, reducing spark voltage requirements and greatly improving ignitability.

Lasting high performance, long life and high response

0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!

1

2

2

　 Platinum-tipped Ground Electrode1

0.4mm IRIDIUM

5kΩ

360 Laser Welding


The iridium tip is mounted with an “All-around Laser Welding” method that insures high reliability and durability even under the most severe driving conditions.

The insulator housing is plated with burnished nickel the same as racing plugs, resulting in high corrosion resistance. (VKA and VKB excluded)



(as of May 2006)

BurnishedNickelPlating

BurnishedNickelPlating



SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA

PHILIPPINES

SAUDIARABIA

SINGAPORE

TAIWAN

THAILAND

JAPAN

MOTOR

CYCLE

SMALL

ENGINE

CROSS

REFERENCE

PART

NUMBER

EUROPE

&USA

22

Because of its long lifetime, recommended to drivers for long driving.

For drivers that care about mileage.As I drive every day, so I want less fuel consumption.

By greatly minimizing electrode wear, DENSO improved mileage and extended the plug’s useful life. Longevity provides you with peace of mind and safety when using .

Stable ignitability improves acceleration

Realizing high ignition performance with a 0.4 mm diameter electrode.

If you use your car on a daily basis, you may be concerned about fuel consumption. is one solution.

0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!0.4 mm diameter iridium alloy and platinum-tipped ground electrode achieve high durability!

For long distance and heavy-use drivers.

If the electrode dia. is fine, the cooling effect on the flame kernel is smaller.

will increase combustion pressure and engine output.

10

200

150

100

50

5

00 15.2 15.4 15.6 15.8

10 10

2

Comparison of Durability

Comparison of Flame Spread

The difference in mileage

The difference in acceleration

Platinum Plugs Normal Plugs

(0.4 mm dia.)

Platinum Plug(1.1 mm dia.)

Normal Plug (2.5 mm dia.)

In-Company Comparison (Data for positive and negative discharging vehicle) In-Company Comparison

In-Company Comparison

Fuel (km/L)

Vehicle: 2000cc, 6 cyl, 4 cycleDriving Conditions: 60km/h on set ground

Normal Plugs (2.5 mm diameter)

Flam

e Area (m

m2)

NormalPlugs

NormalPlugs

NormalPlugs Time (ms) mS＝ sec1

1000

0 1 2 3 4

15.760

15.646

15.231

* From taxi monitoring test results. Displacement is mainly 2000 cc.

* Depending on the driving conditions there will be differences in endurance.

* The service lifetime of Iridium Tough will depend on operating conditions and the vehicles it is installed on. (Service lifetime may become shorter depending on the vehicle’s ignition system.)

0

1

2

3

4Time (ms)

Speed (km/h)

Normal Plugs

0～100

0～80

0～60

0～40

0～20

0 2 4 6 8 10 12 14

12.58 12.66

9.28 9.30

6.32 6.34

3.32 3.34

1.02 1.06

Time (sec)

* The data shown is from internal studies. Also, the “Normal Plug” referred to here is a DENSO product.

Vehicle: 2000cc, 4 cyl, 4-cycle Driving conditions: Creeping (2nd)

Full throttle (100km/h)

Recomm

ended plug replacement period

(10,000 km)

Large Cooling Effect

Normal Plugs

FlameKernel

FlameKernel

Promotion of Flame Kernel GrowthSmall Cooling Effect

Comparison of Combustion Pressure

0.4 mm dia.

Normal Plugs 2.5 mm dia.Time

1600 cc 4 cyl1200 rpm-60 KPa

Co

mb

ustion P

ressure

0.4 Mpa/DIV average ripple mark of 256 cycles.

〈WORSE〉〈BETTER〉 Small variation

Large variation

High Durability

Improved Acceleration

Improved Mileage

Improved Ignitability

is recommended for the following user.


3.5% up!

0.6% up!

5times better!


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

23

http://www.globaldenso.com/PLUG/M

OT

OR

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HIN

AIN

DO

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IAK

OR

EA

MA

LAY

SIA

PHIL

IPPI

NES

SAUD

IARA

BIA

SING

APOR

ET

AIW

AN

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ILA

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OR

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YC

LE

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EN

GIN

EC

RO

SS

RE

FERE

NCE

PA

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N

UM

BE

RE

UR

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E

&U

SA

24

VQ seriesVQ16 •VQ20 •VQ22

JIS 14 19 16 1.1 1.5 3.0 5.7 RC 5 V01 0 42511 05601 5 267700-0740 0 42511 02601 8 100676-3740

JIS 14 19 16 1.1 1.5 3.0 5.7 RC 5 V02 0 42511 05602 2 267700-0750 0 42511 02602 5 100676-3750

JIS 14 19 16 0.8 1.5 3.0 5.4 RC 5 V13 0 42511 05613 8 267700-0760 0 42511 02613 1 100676-3760

ISO 14 19 16 1.1 1.5 3.0 5.7 RC 5 V03 0 42511 05603 9 267700-0710 0 42511 02603 2 100676-3710

ISO 14 19 16 1.1 1.5 3.0 5.7 RC 5 V04 0 42511 05604 6 267700-0720 0 42511 02604 9 100676-3720

ISO 14 19 16 0.8 1.5 3.0 5.4 RC 5 V20 0 42511 05620 6 267700-3720 0 42511 02620 9 100676-3950

ISO 14 19 16 0.8 1.5 3.0 5.4 RC 5 V10 0 42511 05610 7 267700-0730 0 42511 02610 0 100676-3730

ISO,SUS GASKET 14 19 16 1.1 1.5 3.0 5.7 S 5 V40 0 42511 05640 4 267700-5630

ISO,SUS GASKET 14 19 16 1.1 1.5 3.0 5.7 S 5 V41 0 42511 05641 1 267700-5640

ISO,SUS GASKET 14 19 16 0.8 1.5 3.0 5.4 S 5 V36 0 42511 05636 7 267700-5670 0 42511 02636 0 100676-5340

NEW 3 ELECTRODE SHROUD 14 22 16 1.1 2.5 4.0 6.5 RC 5 V22 0 42511 05622 0 267700-5030 0 42511 02622 3 100676-5360

NEW 3 ELECTRODE SHROUD 14 22 16 1.1 2.5 4.0 6.5 RC 5 V23 0 42511 05623 7 267700-5040 0 42511 02623 0 100676-5370

NEW 3 ELECTRODE 14 19 16 1.1 2.5 4.0 6.5 RC 5 V24 0 42511 05624 4 267700-5050 0 42511 02624 7 100676-5380

NEW 3 ELECTRODE 14 19 16 1.1 2.5 4.0 6.5 RC 5 V25 0 42511 05625 1 267700-5060 0 42511 02625 4 100676-5390

Long Reach 14 26.5 16 1.1 1.5 3.0 5.7 RC 5 V17 0 42511 05617 6 267700-3680 0 42511 02617 9 100676-5250

Long Reach 14 26.5 16 1.1 1.5 3.0 5.7 RC 5 V18 0 42511 05618 3 267700-3690 0 42511 02618 6 100676-5150

Long Reach 14 26.5 16 0.8 1.5 3.0 5.4 RC 5 V39 0 42511 05639 8 267700-4540 0 42511 02639 1 100676-5260

Long Reach 14 26.5 16 0.8 1.5 3.0 5.4 RC 5 V19 0 42511 05619 0 267700-2680 0 42511 02619 3 100676-5270

14 19 20.6 1.1 1.5 3.0 5.5 RC 5 V05 0 42511 05605 3 267700-0770 0 42511 02605 6 100676-3770

14 19 20.6 1.1 1.5 3.0 5.5 RC 5 V06 0 42511 05606 0 267700-0780 0 42511 02606 3 100676-3780

14 19 20.6 0.8 1.5 3.0 5.2 RC 5 V07 0 42511 05607 7 267700-0790 0 42511 02607 0 100676-3790

14 17.5 16 1.1 1.5 3.0 5.5 RC 5 V21 0 42511 05621 3 267700-2810 0 42511 02621 6 100676-5280

14 17.5 16 1.1 1.5 3.0 5.5 RC 5 V38 0 42511 05638 1 267700-4480 0 42511 02638 4 100676-5290

12 19 16 0.9 1.3 2.8 5.0 RC 5 V08 0 42511 05608 4 267700-0800 0 42511 02608 7 100676-3800

12 19 16 0.9 1.3 2.8 5.0 RC 5 V09 0 42511 05609 1 267700-0810 0 42511 02609 4 100676-3810

VQ16VQ20VQ22VK16VK20VK20YVK22VK16GVK20GVK22GVKA16VKA20VKB16VKB20VKH16VKH20VKH20YVKH22VW16VW20VW22VT16VT20VXU22VXU24

Spark gap example..............For a 1.1 mm gap, set from 1.0 to 1.1 mm.Insulator projection ..............Length from edge of side housing to top of insulator. The plus (+) direction is the distance from the edge to the piston head.Spark position ......................Length from edge of side housing to top of center electrode. The plus (+) direction is the distance from the edge to the piston head.Ground electrode height ......Length from edge of side housing to top of ground electrode. The plus (+) direction is the distance from the edge to the piston head.Terminal shapes ..................S: solid terminal, R: removable, RC: crimped nut, T: threaded

Specifications

BARCODE DENSO P/NBARCODE DENSO P/N


DIA

.

(mm)

RE

AC

H

(mm)

HE

X

(mm)

GA

P

(mm)

PROJECIO

N

SP

AR

KP

OS

ITIO

N

SPARKELECTRODE

HEIGHT

TE

RM

INA

LS

HA

PE

(mm) (mm) (mm)

RES

ISTO

R

(kΩ)

No

.

TYPE

A Choice of 25 Types to Realize High Performance and High Durability!!

Mainly for automobiles andtrucks

Small JIS-type plugMounting base: 14 mm dia.

L19 mmVQ22 can be used for

upgrading performance if thegap is set to 0.8.

VK seriesVK16•VK20•VK22•VK20Y•VK16G•VK20G•VK22G


ISO-compatible small plugMounting base: 14 mm dia.

L19 mmVK16G, VK20G, and VK22G

have stainless steel gaskets.VK20Y has a gap of 0.8 and is

mainly for use with turboengine vehicles.

VKA seriesVKA16 •VKA20

Corresponding to SK16,20BGR11, and PK20GR8

Shroud-typeBase length: 22 mmFor TOYOTA D4 engineFor Mitsubishi GDI engine

VKB seriesVKB16 •VKB20

Corresponding to SK16BR11and SK20BR11

Base length: 19 mmFor TOYOTA D4 engineFor Mitsubishi GDI engine

VKH seriesVKH16 •VKH20 •VKH22 •VKH20Y

For SubaruFor Peugeot For CitroenFor NISSANFor RenaultFor MitsubishiFor TOYOTAFor ISUZUFor Mercedes Benz, and

othersThread length: 26.5 mm

VW seriesVW16 •VW20 •VW22


Mounting screw: 14 mm dia.L19 mm

VT seriesVT16 •VT20

For Mercedes BenzFor MAZDAFor Ford and otherTapered seat

VXU seriesVXU22 •VXU24

Applicable for light vehiclesMounting base: 12 mm dia.

L19 mmBy fully projecting the

insulator (1.5 mm), the heatrange is widened andignitability is improved.

0.4 mm Diamater Ultra-fine Iridium Center Electrode

Economical!Economical!

Next Generation High Performance Plugs for Taxi

Next Generation High Performance Plugs for Taxi

, through its 0.4mm diameter iridium center electrode, has realized high ignition performance and low spark voltage at levels heretofore unseen. Because of this, there is less non-firing under high spark voltage conditions and fewer misfires under conditions where ignition is difficult, permitting operation with a high level of response under a variety of conditions. As a result, acceleration has been improved.

Through steady ignitability, acceleration performance is greatly improved.

×1000r/min01

23 4 5

67

8

Even during idling, when it is easy for ignition to degrade, reduces mis-sparking and stabilizes idling speed. This results in a quieter engine and improved fuel consumption.

Less fuel consumption with a 0.4mm diameter center electrode.

1

3

2

1

Economical spark plug with high durability, mileage, and acceleration performance.

By welding a platinum tip to the ground electrode, wear has been controlled to a significant extent in the . In addition to acceleration performance, the life and durability of this plug has been increased to that of a platinum plug.

Realizing astounding life and durability with platinum ground electrodes.

RR

R

R

R

R

The ground electrode has a platinum tip, from DENSO’s experience with platinum plugs. This greatly moderates electrode wear and insures high durability.

Platinum-tipped Ground Electrode2

Using a high strength ceramic insulator for LPG engines improves strength by 20% over conventional insulators.

High Strength Insulator3

(Model: VK20T)

Normal Plug(2.5 mm dia.)

Mileage (km/L)

１５.７６０

１５.２３１

Platinum Plug(1.1 mm dia.)

１５.６４６

Fuel Consumption Comparison

Vehicle: 2000 cc, 6 cyl., 4-cycelDriving conditions: 60 km/h on flat ground

0　　　　　15.2　　　　　15.4　　　　　15.6　　　　　15.8

Acceleration comparison

Speed (km/h)

150

100

50

0

0.23 sec difference

0.70 sec difference

Platinum PlugNormal Plug

Time

* The data shown is from internal studies. Also, the “Normal Plug” and “Platinum Plug” referred to here are DENSO products.

* The data shown is from internal studies. Also, the “Regular Plug” and “Platinum Plug” referred to here are DENSO products.

Durability ComparisonRecom

mended tim

e before replacement

(10,000 km)

10 10

2

Platinum Plug Normal Plug

10

5

0

* From taxi monitoring test results. Exhaust volume was for the most part 2000cc.

* Durability will differ depending on the driving conditions.

* The service lifetime of Iridium Plus will depend on operating conditions and the vehicle it is installed on. (Service lifetime may become shorter depending on the vehicle’s ignition system.)

* Recommended time before replacement is not something that must be followed to guarantee quality.

0.4mm IRIDIUM

* Vehicle: 250cc (2 cycle water cooled, V2 cylinders)Conditions: Locked in 6th gear, starting at 50km/h on an automatic test device and accelerating at full throttle.

* The data shown is from internal studies. Also, the “Normal Plug” and “Platinum Plug” referred to here are DENSO products.

14 19 16 0.8 1.5 3.0 5.4 S 5 - 0 42511 05501 8 067700-9540

14 19 20 0.8 1.5 3.0 5.4 S 5 - 0 42511 05502 5 067700-9240

VK20TVW20T

Specifications

BARCODE DENSO P/N

ONE PC BOX

DIA

.

(mm)

RE

AC

H

(mm)

HE

X

(mm)

GA

P

(mm)

PROJECIO

N

SP

AR

KP

OS

ITIO

N

SPARKELECTRODE

HEIGHT

TE

RM

INA

LS

HA

PE

(mm) (mm) (mm)

RES

ISTO

R

(kΩ)

No

.

TYPE

Excellent Durability

Improved Mileage

Improved Acceleration


3.5% up!

5times longer!

0.7sec faster!

In-Company Comparison (Data for positive and negative discharging vehicle)


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

25

Built-in, Highly Reliable Resister


Specifications Include TerminalIncluded with the plug comes with a terminal nut compatible to the Nology Hot Wire and most plug cords around the world. Please remove for vehicle types that do not require terminals. (Some plugs have solid terminals. Please refer to the list.)

All IRIDIUM RACING plugs specify a resistor, and contain a highly reliable monolithic-type resistor that blocks noise that may affect electronic devices. (IW06 has no resistor.)

Burnished nickel plating on the housing, a high level of corrosion resistance has been realized. Also, because the amount on the threads is low, the damage to the female thread in the cylinder is reduced.

The center electrode tip is able to be made fine using a new iridium alloy with a high melting point. The required voltage is reduced, and ignitability is improved greatly. This new iridium alloy’s material composition, manufacturing method *1, and welding method *2 have been patented.

*1. The addition of rhodium to improve high temperature oxidation resistance: Japan Patent 2877035, UK Patent 2302367, People's Republic of China Patent 961022841, Republic of Korea Patent 0292083, U.S.A. Patent 6094000/6262522

*2. Using a melting method instead of the conventional sintering method. Japan Patent 3000955, U.S.A. Patent 5977695

All-platinum Ground Electrode

Compared to the nickel alloy used in conventional spark plugs, the high melting point of platinum will reduce such problems as ground electrode melting and wear. Also, the 0.8mm platinum alloy is welded on and gapped without any bending, reducing residual stress and increasing durability.

Spark Cleaning Pocket

Unbeatable spark technology fine-tuned for racing

1

Insulators for RacingBy using a new, strengthened insulator which was developed during numerous and repeated testing during racing trials, strength is improved by 20%.

2

0.4 mm Diameter Ultra-Fine Iridium Center Electrode

3

Silicone Oil CoatingDuring the start of the race, non-starting from carbon fouling and carbon deposits can be fatal. To stop this, the insulator has been coated with a silicone coating. Using the water repellency of silicone, the insulator surface is isolated from moisture and carbon, preventing a decrease in resistance.

4

360 Laser Welding5

1

2 3

45

Between the center electrode and the insulator, a small pocket has been opened around the tip clearance. When there is carbon

fouling or deposition, this part will discharge and burn off the carbon, restoring electrical resistance. This technology is patented by DENSO (Japan Patent No. 2727558).0.4mm

IRIDIUM The process used to join the iridium tip is a highly reliable “All-around Laser Welding *1 ” process that is able to withstand various

kinds of driving conditions.

*1. This “360 Laser Welding” method has been patented in the U.S.A. and Japan (Japan Patent No.: 2921524, U.S.A. Patent No.: 6078129)



(as of May 2006)



SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA

PHILIPPINES

SAUDIARABIA

SINGAPORE

TAIWAN

THAILAND

JAPAN

MOTOR

CYCLE

SMALL

ENGINE

CROSS

REFERENCE

PART

NUMBER

EUROPE

&USA

26

Reliability and durability, backed by the racing results of major drivers such as Sorberg, Stoner & Koyama

It’s the age of iridium electrodes. Discover more acceleration with 0.4 mm DENSO Racing Plugs. DENSO would like you to try the 0.4 mm advantage. Use and experience a ride like never before.

With an ultra-fine, 0.4 mm diameter center electrode, plugs are the realization of superb ignition performance and reguired voltage at unparalleled levels. Misfires have been controlled and will allow you to have steadily high levels of response and increased acceleration.

Generally, electrodes that project into the combustion chamber have better ignitability and have better performance. However, because of more exposure to high temperature combustion gases and because ground electrode becomes longer, heat resistance and durability decrease. The higher the level of tuning, the greater the need is to use a less projecting type.

As the level of tuning is increased, so does the need for higher heat range.

Through superb ignitability and reguired voltage, non-firing and misfires under a variety of conditions has been greatly reduced. As a result, combustion conditions have improved dramatically, increasing enginen output.

How to Choose a Racing Plug

Identifying IRIDIUM RACING (Stamped into the Center of the Housing)

Overall Shape

Electrode Shape

Unbeatable acceleration performance on the circuit. More power with an ideal combustion cycle.

Improve acceleration and engine power with

×1000r/min01

23 4 5

67

8

×1000r/min01

23 4 5

67

8

1 2 3 4 5 6 7 8 9 10 11 12

Plug

Normal race plug

(0.8 mm electrode)

13.9　 14.0

13.950

13.985

Time to reach 100 km/h (s)

* The data shown is from internal studies. Also, the “Regular Racing Plug” referred to here is a DENSO product.

* The data shown is from internal studies. Also, the “Regular Racing Plug” referred to here is a DENSO product.

Plug 33　　　　　　　 34

33.92

33.49

Output (ps) [at 120 km/h]

Regular race plug (0.8 mm electrode)

Vehicle: 250 cc (2-cycle water cooled, 2 cylinder) Conditions: WOT 60 to 129 km/h (locked in 6th gear) Vehicle: 250 cc (2-cycle water cooled, 2 cylinder) Conditions: WOT 60 to 120 km/h (locked in 4th gear)

0　　　5　　 10　　15　　 20　　25　　 30

50 mm

150

100

50

Time (s)50 60 70 80 90 100 110 120 130

Horsep

ower (P

S)

35

30

25

20

15

10

Speed (km/h)

Normal race plug (0.8 mm electrode)

Normal race plug (0.8 mm electrode)

Speed (km/h)

19mm 19mm

19mm17mm

21mm

19mm19mm

19mm

21.5mm

51 mm

66 mm

56 mm

47.3 mm

50.5 mm

53 mm

27.6 mm

22 mm

27.6 mm

19 mm

26.5 mm

50.5 mm

62 mm

62 mm

Variety Heat RangeThreadSize

Intermediate Number(Electrode Shape)

Intermediate Number(Overall Size)

-

I : Iridium

1 : Slant ground electrode or surface gap plug.

24 27 29 31 32 34 35

2 : Flat ground electrode

6 : Slant ground electrode and non-resistor plug

UXU

AAE

KKH

QRERLRTW

WM

：10 mm ：12 mm ：14 mm ：14 mm ：14 mm ：14 mm ：14 mm ：14 mm ：14 mm ：14 mm ：14 mm ：14 mm

R : Surface Gap

(Exception) IRE01 has a flat ground electrode.

Warning: On choosing the right racing plug

RU01- are surface gap plugs, not ones with iridium center electrode and all-platinum ground electrodes. : indicote's the heat range.

is ideal for racing and tuned-up engines; please choose one based on the heat range of the standard plug or plugs used currently that is suited to your level of tuning.

A B C D D

R0373A, R0379A, R016

R0045J, R0045Q

U-E

U-E (SURFACE)

IU01-

RU01-※

XU-E

ROTARY ENGINE

IXU01-

IRE01-

W-E

W-E (NON=RESISTOR)

IW01-

IW06-

W-EM

ISO (SLANT ELECT)

IWM01-

IK01-

ISO (STRAIGHT ELECT)

SLANT ELECT

IK02-

IQ01-

STRAIGHT ELECT

FOR DETONATION COUNTER

IQ02-

IA01-

FOR W/OUT DETONATION COUNTER

K-LONGREACH

IAE01-

IKH01-

ROTARY ENGINE RX8

ROTARY ENGINE RX8

IRL01-

IRT01-

R216, R2525

R6725

R6385P, R7379, R6918B

B-EGP, R4630A

R5184, R6179AP

R7116, R7117

R7279, R7118, R7119

R7236, R7237

R7238, R7239

R7282A, R6120A

R7282, R6120

R7438

R7440A-L

R7440B-L

1 A

1 C

2 A

3 B

4 A

4 A

5 A

6 A

6 B

7 A

7 B

8 A

9 A

10 A

11 A

12 A

Cross ReferenceDENSO TYPE FigureElectrode

Improved Acceleration×1000r/min0

1

23 4 5

67

8Improved Horse Power

is recommended for the following user.


0.3% faster!

1.3% up!


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

27


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA

PHILIPPINES

SAUDIARABIA

SINGAPORE

TAIWAN

THAILAND

JAPAN

MOTOR

CYCLE

SMALL

ENGINE

CROSS

REFERENCE

PART

NUMBER

EUROPE

&USA

28

BARCODE DENSO P/N

ONE PC BOXSPEC

DIA

.

(mm)

RE

AC

H

(mm)

HE

X

(mm)

GA

P

(mm)

PROJECIO

N

(mm)

SP

AR

KP

OS

ITIO

N

(mm)

SPARKELECTRODE

HEIGHT

(mm)

TE

RM

INA

LS

HA

PE

RES

ISTO

R

(kΩ)

No

.

TYPE

ISO (SLANT ELEC.) 14 19 16 0.7 -1.0 0.5 2.0 S 5 R01 0 42511 05701 2 267700-1310

ISO (SLANT ELEC.) 14 19 16 0.7 -1.0 0.5 2.0 S 5 R02 0 42511 05702 9 267700-1320

ISO (SLANT ELEC.) 14 19 16 0.7 -1.0 0.5 2.0 S 5 R03 0 42511 05703 6 267700-1330

ISO (SLANT ELEC.) 14 19 16 0.7 -1.0 0.5 2.0 S 5 R42 0 42511 05742 5 267700-1340

ISO (STRAIGHT ELEC.) 14 19 16 0.7 -2.3 -0.8 0.7 S 5 R04 0 42511 05704 3 267700-1360



LONG REACH 14 26.5 16 0.7 -1.0 0.5 2.0 S 5 R49 0 42511 05749 4 267700-4450

LONG REACH 14 26.5 16 0.7 -1.0 0.5 2.0 S 5 R50 0 42511 05750 0 267700-4460

LONG REACH 14 26.5 16 0.7 -1.0 0.5 2.0 S 5 R51 0 42511 05751 7 267700-4470

SLANT ELEC. 14 19 16 0.7 -1.0 0.5 2.0 S 5 R07 0 42511 05707 4 267700-1410

SLANT ELEC. 14 19 16 0.7 -1.0 0.5 2.0 S 5 R08 0 42511 05708 1 267700-1420

SLANT ELEC. 14 19 16 0.7 -1.0 0.5 2.0 S 5 R09 0 42511 05709 8 267700-1430

SLANT ELEC. 14 19 16 0.7 -1.0 0.5 2.0 S 5 R43 0 42511 05743 2 267700-1440

STRAIGHT ELEC. 14 19 16 0.7 -2.3 -0.8 0.7 S 5 R10 0 42511 05710 4 267700-1460

STRAIGHT ELEC. 14 19 16 0.7 -2.3 -0.8 0.7 S 5 R11 0 42511 05711 1 267700-1470

STRAIGHT ELEC. 14 19 16 0.7 -2.3 -0.8 0.7 S 5 R12 0 42511 05712 8 267700-1480

W-E 14 19 20.6 0.6 -1.5 0.0 1.6 RC 5 R13 0 42511 05713 5 267700-1110

W-E 14 19 20.6 0.6 -1.5 0.0 1.6 RC 5 R14 0 42511 05714 2 267700-1120

W-E 14 19 20.6 0.6 -1.5 0.0 1.6 RC 5 R15 0 42511 05715 9 267700-1130

W-E 14 19 20.6 0.6 -1.5 0.0 1.6 RC 5 R16 0 42511 05716 6 267700-1140

W-E 14 19 20.6 0.6 -1.5 0.0 1.6 RC 5 R17 0 42511 05717 3 267700-1150

W-E 14 19 20.6 0.6 -1.5 0.0 1.6 RC 5 R18 0 42511 05718 0 267700-1160

W-E NON RESISTOR 14 19 20.6 0.6 -1.5 0.0 1.6 S 0 R44 0 42511 05744 9 067600-1810



ROTARY ENGINE 14 21.5 20.6 0.7 -2.2 -0.7 0.8 RC 5 R19 0 42511 05719 7 267700-1520





ROTARY RX8 (LEADING) 14 21 20.6 1.1 -2.5 -0.5 1.6 S 5 R54 0 42511 05754 8 267700-4820

ROTARY RX8 (LEADING) 14 21 20.6 1.1 -2.5 -0.5 1.6 S 5 R55 0 42511 05755 5 267700-4830

ROTARY RX8 (TRAILING) 14 19 20.6 1.1 -2.5 -0.5 1.6 S 5 R52 0 42511 05752 4 267700-4840

ROTARY RX8 (TRAILING) 14 19 20.6 1.1 -2.5 -0.5 1.6 S 5 R53 0 42511 05753 1 267700-4850

WITH DETONATION COUNTER 14 22 16 0.6 -1.0 0.5 1.9 S 5 R23 0 42511 05723 4 267700-1260



W/OUT DETONATION COUNTER 14 19 16 0.6 -1.3 0.5 2.1 S 5 R47 0 42511 05747 0 267700-2940

W/OUT DETONATION COUNTER 14 19 16 0.6 -1.3 0.5 2.1 S 5 R48 0 42511 05748 7 267700-2950

W-EM 14 19 20.6 0.6 -1.5 0.0 1.6 S 5 R26 0 42511 05726 5 267700-1210

W-EM 14 19 20.6 0.6 -1.5 0.0 1.6 S 5 R27 0 42511 05727 2 267700-1220

W-EM 14 19 20.6 0.6 -1.5 0.0 1.6 S 5 R28 0 42511 05728 9 267700-1230

W-EM 14 19 20.6 0.6 -1.5 0.0 1.6 S 5 R29 0 42511 05729 6 267700-1240

XU-E 12 19 16 0.6 -1.5 0.0 1.4 R 5 R30 0 42511 05730 2 267700-1060

XU-E 12 19 16 0.6 -1.5 0.0 1.4 R 5 R31 0 42511 05731 9 267700-1070

XU-E 12 19 16 0.6 -1.5 0.0 1.4 R 5 R32 0 42511 05732 6 267700-1080

XU-E 12 19 16 0.6 -1.5 0.0 1.4 R 5 R33 0 42511 05733 3 267700-1090

U-E 10 19 16 0.6 -1.8 -0.3 1.2 R 5 R34 0 42511 05734 0 267700-1010

U-E 10 19 16 0.6 -1.8 -0.3 1.2 R 5 R35 0 42511 05735 7 267700-1020

U-E 10 19 16 0.6 -1.8 -0.3 1.2 R 5 R36 0 42511 05736 4 267700-1030

U-E 10 19 16 0.6 -1.8 -0.3 1.2 R 5 R37 0 42511 05737 1 267700-1040

U-E (SURFACE) 10 19 16 1.1 -0.2 0.0 0.0 R 5 R38 0 42511 05738 8 267700-1570

U-E (SURFACE) 10 19 16 1.1 -0.2 0.0 0.0 R 5 R39 0 42511 05739 5 267700-1580

U-E (SURFACE) 10 19 16 1.1 -0.2 0.0 0.0 R 5 R40 0 42511 05740 1 267700-1590

IK01-24IK01-27IK01-31IK01-34IK02-24IK02-27IK02-31IKH01-24IKH01-27IKH01-31IQ01-24IQ01-27IQ01-31IQ01-34IQ02-24IQ02-27IQ02-31IW01-24IW01-27IW01-29IW01-31IW01-32IW01-34IW06-27IW06-31IW06-34IRE01-27IRE01-31IRE01-32IRE01-34IRE01-35IRL01-27IRL01-31IRT01-31IRT01-34IA01-31IA01-32IA01-34IAE01-32IAE01-34IWM01-29IWM01-31IWM01-32IWM01-34IXU01-24IXU01-27IXU01-31IXU01-34IU01-24IU01-27IU01-31IU01-34*RU01-27*RU01-31*RU01-34* These plugs do not have iridium electrodes.Spark gap example ....................For a 1.1 mm gap, set from 1.0 to 1.1 mm.Insulator projection.....................Length from edge of side housing to top of insulator. The plus (+) direction is the distance from the edge to the piston head.Spark position ............................Length from edge of side housing to top of center electrode. The plus (+) direction is the distance from the edge to the piston head.Ground electrode height.............Length from edge of side housing to top of ground electrode. The plus (+) direction is the distance from the edge to the piston head.Terminal shapes.........................S: solid terminal, R: removable, RC: crimped nut, T: threaded

Specifications


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

29

NGKFIGURE REACH

(mm)HEX(mm)

RESISTOR FIGURE TYPEDIA.(mm)

(Note 1) IW06 is a non resistor type(Note 2) Remove the gasket with nippers before use(Note 3) IXm B and IXm is different from IXU01-m only in the hex size (18 mm or 16 mm), and are otherwise interchangeable in terms of installation. (m ) show the heat range.

14 19 20.6 BP-E R4304A-14 19 20.6 B-E BEGP14 19 20.6 B-E BEGV14 19 20.6 B-E R4118S-14 19 20.6 B-E R4630A-14 19 20.6 R B-E R6252K-14 19 20.6 R B-E R6918B-14 19 20.6 R B-E R6918C-14 19 20.6 R B-E R6021E-14 19 20.6 R B-E R6385-P14 19 20.6 R B-E R7376-(Ir)14 19 20.6 B-E SEMISURFACE R5649-14 19 20.6 R B-E SEMISURFACE R6712-14 19 20.6 B-E COMPACT R5184-14 19 20.6 R B-E COMPACT R5300A-14 19 20.6 R B-E COMPACT R5300N-14 19 20.6 R B-E COMPACT R5540F-14 19 20.6 R B-E COMPACT R6179A-P14 22 20.6 R B-E COMPACT R6179C-PA14 22 20.6 R B-E R7376B(Ir)14 22 16 R BC-E COMPACT R6120A-14 22 16 R BC-E COMPACT R7282A-（Ir)14 19 16 R BC-E COMPACT R6120-14 19 16 R BC-E COMPACT R6120C-14 19 16 R BC-E COMPACT R6120M-14 19 16 R BC-E COMPACT R7282-(Ir)14 19 16 R BC-E COMPACT R7282C-(Ir)14 19 16 R BC-E COMPACT R7282M-(Ir)14 19 16 R BK-E ISO R6888A-14 19 16 BK-E ISO R7112-14 19 16 R BK-E ISO R7113-14 19 16 R BK-E ISO R7433-(ir)14 19 16 BK-E ISO R7114-14 19 16 R BK-E ISO R7115-14 19 16 BK-E ISO R7116-14 19 16 R BK-E ISO R7117-14 19 16 BK-E ISO R7118-14 19 16 R BK-E ISO R7119-14 19 16 R BK-E ISO R7434-(Ir)14 19 16 R BK-E ISO R7279-(Ir)14 19 16 R BK-E SEMISURFACE R6601-14 19 16 BK-E SEMISURFACE R6711-14 19 16 R BCP-E R7435-(Ir)14 19 16 BCP-E R7232-14 19 16 R BCP-E R7233-14 19 16 BC-E R7234-14 19 16 R BC-E R7235-14 19 16 BC-E R7236-14 19 16 R BC-E R7237-14 19 16 BC-E R7238-14 19 16 R BC-E R7239-14 19 16 R BC-E R7436-(Ir)14 19 16 BC-E SEMISURFACE R5883-14 19 16 R BC-E SEMISURFACE R6690-14 26.5 16 R LFR R7437-(Ir)14 26.5 16 R LFR R7438-(Ir)14 12.7 20.6 B-H R5525-14 12.7 20.6 B-H R5530-14 21.5 20.6 R ROTARY R6725-14 21.5 20.6 R ROTARY R7420-(Ir)14 21.5 20.6 ROTARY, SURFACE T813J-N1314 21 20.6 R ROTARY RX-8(L) R7440A-L(Ir)14 19 20.6 R ROTARY RX-8(T) R7440B-T(Ir)12 19 18 D-E R216-12 19 18 D-E R217-12 21 18 D-Z R2188-12 19 16 R DC-E SEMISURFACE R2349-12 19 16 R DC-E R2525-12 19 16 DC-E SEMISURFACE R2430-10 19 16 C-E R016-10 19 16 C-E R017-10 19 16 C-E R0373A-(Ir)10 19 16 C-E SEMISURFACE R0045G-10 19 16 C-E SEMISURFACE R0045J-10 19 16 R C-E SEMISURFACE R0045Q-10 19 16 R C-EH HALF THREAD R0379A-10(Ir),R0409B-10 12.7 16 C-H R0161-8 19 12.7 R E-EH SEMISURFACE R847-

IW 4 DIW01/IW06-(Note 1) 4 A

IW 4 DIW 4 D

IW01/IW06-(Note 1) 4 AIW01/IW06-(Note 1) 4 AIW01/IW06-(Note 1) 4 AIW01/IW06-(Note 1) 4 A

IW 4 DIW01/IW06-(Note 1) 4 AIW01/IW06-(Note 1) 4 A

IWM01- 5 A

IWM01- 5 A

IA01- 8 AIA01- 8 AIAE01- 9 AIAE01-(Note 2) 9 AIAE01-(Note 2) 9 AIAE01- 9 AIAE01-(Note 2) 9 AIAE01-(Note 2) 9 A

IK 6 DIK 6 DIK 6 DIK 6 DIK 6 DIK 6 D

IK01- 6 AIK01- 6 AIK02- 6 BIK02- 6 BIK01- 6 AIK02- 6 B

IQ 7 DIQ 7 DIQ 7 DIQ 7 DIQ 7 D

IQ01- 7 AIQ01- 7 AIQ02- 7 BIQ02- 7 BIQ01- 7 A

IKH 10 DIKH01- 10 A

IWF ― D

IRE01- 3 BIRE01- 3 B

IRL01- 11 AIRT01- 12 AIXU01-(Note 3) 2 A

IX(Note 3) IXU01-(Note 3) 2D ,2A

IXU01-(Note 3) 2 A

IU01- 1 AIUA 1 E

IU01- 1 A

RU01- 1 CRU01- 1 CIU01- 1 A

IUF(A) ―D ,―EIY ― D

B CA

1

50mm

2

51mm

3

66mm

6

50.5mm

7

53mm

4

56mm

5

47.3mm

11

62mm

21mm

12

62mm

19mm

8

27.6mm

22mm

For detonationcounters

9

27.6mm

19mm

10

50.5mm

26.5mm

Overall shape

Electrode shape

ED

CROSS REFERENCE

IGNITION TECH Q&A

These are chassis dynamo test results comparing a Vitz 1300 using and another which uses Normal plugs are shown below. With the normal plugs, the

output is 98.2PS, while torque is 14.8 kgf; when this was changed to the , the output was 99.3PS, while torque was 15.2 kgf. (This is approximately a 1.5% improvement in output.)

uses a platinum tip for the ground electrode and a high strength fine insulator for racing. Also,

there is a silicone coating on the insulator giving it an increased resistance to carbon fouling. However, because of the withdrawn spark position, the has the high ignitability of the two. Instead, because of the “extension” in engine revolution felt by many at high revolutions, it is popular with customers who race. Choose “ ” for response and “ ” for high revolutions. is particularly popular on the circuit scene.

We sometimes hear that “ is too sensitive to setting changes.” However, the flip side to sensitivity is that “the response to setting changes is fast

and easier,” and during races, we hear that it makes setting changes easier. If is used, it should become possible to draw out more performance from your vehicle.

Improved combustion efficiency will clean your exhaust emission! Fuel consumption will improve too!With the superior ignitability of ultra-thin electrodes (0.4 mm), combustion efficiency will be improved.Cleaner Exhaust EmissionsCO and CO2 levels will decrease in the “EURO III” emissions test to be implemented in the feature.Improved MileageA great bonus for long-distance drivers.

Even for those who are concerned about the environment, we recommend Iridium Power.

Iridium Plug Motorcycle Emissions Comparison Test Test Vehicle: CBR250Test Conditions: EURO IIITest Equipment: MEXA-7400, CVS 7100Tested Plugs: U24FER9 (Ni Plug) Gap: 0.85

IUH24 (Ir Plug) Gap: 0.85

Will my exhaust emissions be cleaner if I put on ?

Will output and torque increase if I use ?Q.1 Q.4

Q.2

Q.3

Is there a standard for differentiating the uses of and ?

How does the engine respond to changed settings?

A A

A

A

about Plug PerformanceQ&A about Plug PerformanceQ&AQ&A about Plug Performance

120

100

80

60

40

20

0

30

25

20

18

10

5

045 90 135 180 km/h

(kgf)(PS)

Horsepower (Ir)Horsepower (Normal)Torque (Ir)Torque (Normal)

Test 1

18.9 19 19.1 19.2

Fuel Consumption (km/L) (In-Company Comparison)

19.3 19.4 19.5

19.0967 19.4606

Test 2

19.1110

19.4241

Test 1

69.5 70 70.5 71

CO2 (g/km) (In-Company Comparison)

71.5 72 72.5 72

72.768270.9184

Test 2

72.1660

70.9778

Test 1

24.5 24.6 24.7 24.8

CO (g/km) (In-Company Comparison)

EURO III Test Pattern (In-Company Comparison)

24.9 25 25.1 25.2

25.0523

24.7491

Test 2 25.156924.7826

U24FER9 IUH24Normal Plug

140

120

100

80

60

40

20

0

Speed(km/h)

Time

In-Company Comparison

D-1race


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Q.5

A

Q.6

A

What kind of vehicles are surface gap plugs used for?

Q.7

A

Q.8

A

These are plugs developed for racing, and there are many people who use these plugs in the All-Japan Road Race

Championship JSB1000 class and in drag racing. Because the ground electrode is gone, there are the following advantages and disadvantages.

Advantages[1] When the engine is tuned so that the compression ratio is

increased, these can avoid interference with the piston.[2] Because there are no excess projections into the combustion

chamber, the combustion efficiency at high revolutions is improved.[3] Difficulties due to the ground electrode can be prevented.

Disadvantages[1] The ignitability becomes worse, and thus feeling and response

at low and mid-revolutions deteriorates.[2] For peak engine characteristics demanded under the most

severe operating conditions. In the popular ST600 class, many drivers use a plug with a ground electrode.

How is the compatibility with plug cords such as Nology?

There are no particular issues with compatibility. In fact, there are some cord manufactures who sell products

“especially for iridium plugs.”

When changing plugs, is there any need to change the settings?

Q.9

A

Q.10

A

For normal vehicles, there is no need to change the settings. It is advisable to reset vehicles with modified

exhaust systems, though in most cases adjusting the air screw is sufficient. (Except for racing carburetors such as FCRs)

Is there a way to tell them apart when replacing them?

This can be done by confirming the level of wear (the gap width) on the ground electrode. DENSO’s Iridium

electrodes are different from conventional products in that their center electrodes hardly wear, and because of this it is better to check for wear on the ground electrode.

about Plug PerformanceQ&A about Plug PerformanceQ&A

This is possible. The reason: because of the 0.4mm center electrode in Iridium Power and Iridium Tough plugs, they

have a lower spark voltage compared to double, triple, and quadruple electrode plugs. Please refer to the Standard Resistor Model Quick Chart.

Spark VoltageThe thinner the electrode is, the stronger the electrical field is. Because the electrical field affects spark voltage, a thinner electrode lowers spark voltage. If each type of electrode shape is modeled as shown below, Iridium Tough has a lower voltage than double electrode plugs.

IgnitabilityThe more the contact area between the flame kernel and the electrode is minimized, the smaller the cooling action from the electrodes and the better ignitability is. Because of the 0.4mm center electrode, the contact area between the flame kernel and the electrode is small, resulting in excellent ignitability.

Service lifetime of plugsThe service lifetime of a spark plug may be shortened due to driving conditions or ignition properties when used in a vehicle equipped with a simultaneous ignition system (plus-minus discharge and D-DL methods). Please ask your dealer to check if your vehicle is equipped with a simultaneous ignition system. The simultaneous ignition system fires the plug at the top dead center point not only of the compression stroke, but also the exhaust stroke.

Can I replace my double, triple, or quadruple electrode plugs to or ?

Double electrode plug

Needle and sphere Plate and platePlate and needle

Normal Plug

Plug

Reguired voltage Low High

Electrodemodel

Ground

Center

Double electrode plug

Small coolingeffect

Large cooling effect

The vehicle seems to be running worse now that I’ve installed them?

In most cases there is a problem with the vehicle. Scooters are often run for long periods of time without maintenance,

and it is common to see them with richer fuel-air mixtures from dirty air cleaners. Our investigations have found that these vehicles tend to be susceptible to carbon fouling, and when replacing plugs also remember to inspect and clean the air cleaner. The effectiveness of the change should become even more apparent.


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IGNITION TECH Q&A

DENSO has and to meet the needs of tuned and racing engines. For the engine

described in the question, the right plug should be around IK (IQ) 22, 24, or 27. Here is an introduction to using the different types of the Iridium Series on racing engines. : NA Tuned (Short distance racing), Turbo tuned where a regular turbine has been tuned to increase the boost. (01 Type): The 01 Type is usually called the slant ground electrode type. If your car is turbo tuned where the turbine has been replaced and the boost pressure is above 1.2 to 1.3 kg/cm2, an 01 type is needed. Also, if a NA tuned engine with comparatively high vibration (4 cylinders) is to be raced over long distances, switching to this type can increase the reliability of the ground electrodes. (02 Type): The 02 type (flat ground type) is appropriate for higher output engines than the 01 type, but because the spark position is withdrawn compared to the 01 type, only consider this plug for racing applications.

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Motorcyclesabout

Motorcycles

It’s difficult to give a heat range based on going from 150PS to 200PS alone, and it’s best if you judge the condition of your

current plugs and judge for yourself, but as a general rule, for boost pressures between 1.0 and 1.2 kg/cm2, an IK24 should be sufficient. During the winter, IK22 should improve starting and low speed feel. The heat range is different depending on how the engine has been tuned and how it’s used; using an increase in heat range of 1 or 2 as a starting point, decide on a heat range, always looking at the condition of your current plugs.

In the rotary engines in some old Mazda’s on the T (Trailing) side there is a plug, the terminal nut for which must be

removed. In others, the removal of the T side plug terminal nut is necessary as in the Cosmo (HB22S). DENSO has for rotary engines, with a variety of heat ranges from #27 to #35. for Rotary Engines come standard with terminal nuts.

We frequently hear that is resistant to carbon fouling compared to plugs from other companies.

However, there is no way that they are a 100% solution, and it’s good to know these techniques to prevent carbon fouling.[1] When rolling in the race, close the carburetor’s low needle or

pinch the fuel pipe with your hand to prevent excess fuel from entering the engine.

[2] By pumping the accelerator during rolling, a rich fuel air mixture goes into the engine, making it easier for carbon fouling to occur. Operate the accelerator gently.

[3] If carbon fouling happens while running with the throttle fully open, this could mean that the heat range is too low or that the fuel mix is to rich. Consult with a kart shop to find the optimum setting.

The following suggestions are only guidelines. First, regarding thermal value, if the boost pressure is 1.4 or lower, please

choose No. 24. For thermal values of 1.5 or above, we recommend using No. 27. Thermal value may vary depending on the engine type and tuning, so please decide after checking the burned condition of the plugs.Next, regarding the type of plug, if the boost pressure is 1.7 or lower, either or can be used. As a guideline, if you often drive with lower speeds or in town, is recommended since it is resistant to carbon fouling. If you are racing in 400-meter runs or often drive at high speeds, we recommend . When the boost pressure exceeds 1.7, it causes misfiring at high rpm. In such cases, it is necessary to use .

The DENSO Iridium Series have the world’s thinnest 0.4 mm iridium center electrodes, but because the durability of the

iridium alloy developed by DENSO is higher that even platinum, which has in the past been said to be the most durable, it can be said that it’s the best plug for tuned engines. Specifically, it has the following advantages:[1] Iridium alloy has a melting point and hardness above that of

platinum, even turbo, with its high combustion temperature, can be used with confidence. Also, even when used with powerful ignition systems such as MSD and MDI, these plugs are even more reliable than platinum racing plugs.

[2] The issue for high boost engines is that misfiring that occurs at high revolutions. The fine electrodes of the Iridium series require a lower voltage, allowing the energy generated by the coil to be sparked without losses. It can be said the 0.4 mm dia. DENSO

series are a strong ally of tuned high-boost turbo systems.

Q.1

Q.2

Q.3

A

A

A

I have a 4AG engine NA tuned, with a Solex 44 dia. carburetor installed, giving a 200PS output. Which plug is good for a car such as this?

What is the optimum heat range for a tuned up Golf4 GTI 1.8L Turbo?(Tuning: Turbine Changed, High Volume Injector Installed, and ROM Adjusted to give an output of 200PS from 150PS.)

Q.5

Q.6

Q.4

A

A

A

I drive a GT-R tuned to 850HP. Would it be okay to install 0.4 mm dia. Iridium Power series plugs?

Can an be installed on an RX-7 (SA22C Turbo Model)?

The plugs of racing karts are susceptible to carbon fouling, but how does do in this case?

Please advise us about selecting a plug for upgraded turbo engine vehicles.

about Tuning CarsQ&A about Tuning CarsQ&AQ&A Q&AQ&Aabout Tuning Cars


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In 4-cycle engines, a spark is produced for every 2 revolutions of the crankshaft, resulting in explosion and

combustion in the engine. In 2-cycle engines, a spark is produced for each revolution of the crankshaft, resulting in explosion and engine combustion in the engine. This simple comparison may lead you to conclude that 2-cycle engines simply have twice the wear; however wear is made up of not only wear from sparking, but also wear from high temperatures (oxidation). Thus, the amount of wear depends on the driving conditions of the vehicle, how the rotations of the engine are applied (that is, how the shift is used), and whether the resulting combustion temperature is high or low.2-cycle engines have a higher level of electrode wear. This electrode wear is estimated at approximately 1.5 to 2 times that of 4-cycle engines, and plug life is also shorter with 2-cycle engines. Iridium has a high melting point; however, it will undergo wear from sparking and wear from high temperatures (oxidation). To our knowledge, 2-cycle engines are only found in 2-wheel vehicles, our recommended value in this catalog for lifetime is 3000 to 5000km. (This value is based on a variety of conditions, and, racing use may require even more frequent replacement.) From the above, it is recommended that plugs for 2-cycle engines be replaced about every 3000km. However, the condition of wear depends on operating conditions and the typical engine rpms, so it is also possible to take out the plugs occasionally to confirm the amount of electrode wear and judge when the best time is to replace the plug.

comes standard with a plug terminal (not including combined types). This is because some of the other

companies’ plug cords require a terminal, and at DENSO we decide our product specifications keeping in mind every customer.

Since the 996R, the interior of the Testastretta (narrow head) engine’s plug holes have been very narrowly machined, and

with regular plug wrenches, the socket OD hits the wall and thus the plugs cannot be fully tightened. (Not possible with a 21.5mm OD) In this case, a thin-wall plug wrench is required. [We recommend the “NB3-16SP (nepros)” or the “B3A-16SP” by KTC.]

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Motorcyclesabout

Motorcyclesabout

Motorcycles

Plugs for motorcycle vehicles with a “V” in the part number have a platinum tip welded to the ground electrode, the same

as in 4-wheel vehicles. They have more durability than Iridium Power, but do last 100,000 km. Thus we do not offer them as Iridium Tough products. You can choose the Iridium Power plug for those vehicle types with a compatible Iridium Power plug shown in the Model Chart; however, please understand that it will be not as durable.

A loud explosive “pop” pop sound can have the following two causes:

(1) An afterfiring muffler(2) Backfiring due to blowback from the carburetor If it is the same vehicle and these symptoms were not there before changing to the new plugs, the reason for this is (1) afterfiring. The causes of afterfiring are:(1) An abnormally elevated intake pressure, the combustion

becomes unsteady (during engine brake)(2) A problem with an ignition device (improper ignition timing,

misfiring)(3) The fuel-air mixture is too rich (problem with the carburetor, too

much choke)(4) The valve timing is off If the problem is during starting, (2), (3), or (4) are thought to be the reason. A specific example for (2) is “ignition timing that is off” and specific examples for (3) include “a dirty air cleaner” and “pulling the choke too much.”We often hear that Iridium plugs improve ignitability so much that people “don’t have to pull the choke to start the engine.” If you are pulling the choke to full, try pulling it to the “halfway” point and see if this solves the problem.

The “IW series” is well suited for most trial vehicles. Though these vehicles frequently use a low heat range, the heat

ranges available for starts with IW16, so choose one that matches the type of driving you do. Better accelerator response and torque can be expected with , which has excellent ignitability. Recently, with downsizing of the space to install plugs in trial vehicles, demand for miniature plugs is increasing. In these cases, try the IK types. However, the space between the plug cable and the insulator will require waterproofing.

Q.2

Q.4

Q.6

Q.5

A

A

A

A

A

A

Q.1

Q.3

about Tuning CarsQ&A about Tuning CarsQ&A Q&AQ&AQ&A

How is the compatibility with trial Motorcycle?

What is the difference in the life of an used under 2-cycle conditions and one used under 4-cycle conditions?

Is it true that installation on Ducati watercooled 4-valve engines is not possible?

The terminal on the end of the plug is frequently unnecessary on motorcycle, so why is this included with all types?

I see that plugs, such as VUH27D and VK24PRZ11, are available for Honda vehicles. Will they last 100,000 km? Also, can be substituted here?

I installed on to my motorcycle vehicle. Sometimes when I start it, there is a loud, explosive “pop.” With regular plugs this did not happen. Why is the reason for this?


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Long-reach plugCars & trucks plugs

K20HR-U11・K16HPR-U11

EX.

D14L26.516

TOYOTA

0.4 mm dia. iridium plugIridium plug

IUH27D・IUH24DEX.

Supplied 0.4 mmdiameter iridiumplugs to HondaMotorcycles for thefirst time in theworld.

D12L (6.3 +12.7) 14

HONDA MotorcyclesCBR900RR


IU27DEX.

D10L19 16 YAMAHA

Motorcycles YZFR-1 SUZUKI

GSX1300RB-KING

12 mm long-reach iridium plugIridium plug

ZXE20HR13EX.

By joining an ultra-fine0.55 mm diameteriridium alloy tip oncenter electrode andplatinum tip on groundelectrode, this iridiumplug has realized a verylong lifetime.

D12L26.514

NISSAN

0.4 mm dia. iridium plug withplatinum tip ground electrode

Iridium plug

SVK20RZ11・SVK20RZ8・VK16PR-Z11・VK20PR-Z11・VK22PR-Z11・VK24PR-Z11・VK27PR-Z11

EX.

D14L19 16 DAIHATSU /

MITSUBISHI /HONDA


Iridium plug

VNH27Z・VNH24ZEX.

D10L(6.3 +12.7) 16

Honda Motorcycles


Iridium plug

VUH27D・VUH27ES・VUH24D・

EX.

D10L(6.3 +12.7) 16

Honda Motorcycles* VUH27ES with

stainless steelgasket


IXU22CEX.

D12L19 16 SUZUKI

New triple-electrode iridium plugIridium plug

SK20BR11・SK20BGR11EX.

Under normaloperating conditionsthe main electrodesparks, but if itbecomes fouled, sideelectrodes generatethe spark to burn offany carbon - thisplug is the optimumdesign for direct fuel-injection engines.Equipped as originalparts for 3000 ccdirect injectionengines (D-4) onTOYOTA’s CROWNand other models.

D14L19 16 TOYOTA

Iridium plugIridium plug

SK20R11・SK16R-P11・SK20PR-A11・SK20PR-B11・SK16PR-E11・SK20PR-F8・SKJ16CR-L11・SKJ16CR-A8

EX.

We developed a 0.7mm diameter ultra-fine iridium alloyelectrode, the first inthe world. Ignitabilityand lifetime havedramaticallyimproved. TheSK16R-P11 isequipped as originalparts on TOYOTA’sCENTURY.

D14L19 16 TOYOTA / HONDA /

MAZDA / MITSUBISHI /HYUNDAI / SUZUKI

Iridium plug with stainless steel gasketIridium plug

SK22PR-M11S・SK20PR-L9S

EX.

D14L19 16 HONDA

Extended shroud iridium plugIridium plug

SKJ20DR-M11S・SKJ20DR-M11

EX.

D14L20.5 16 HONDA* SKJ20DR-M11S

with stainless steelgasket

12 mm long-reach iridium plugIridium plug

SXU22HR9・SXU22HDR8・SXU16HPR9

EX.

D12L26.516

DAIHATSU / ISUZU /MITSUBISHI

Long-reach iridium plugIridium plug

SK16HR11・SK20HPR-L11EX.

D14L26.516

Honda / Toyota

Super ignition, iridium plugIridium plug

FK16R11・FK16PR11EX.

Super Ignition Plug D14L19 16 TOYOTA MAZDA

Super ignition, long-reach iridium plugIridium plug

FK20HR11EX.

Super Ignition Plug By pairing an ultra-fine

0.55 mm diameteriridium alloy tip on thecenter electrode with aplatinum tip on theground electrode, thisiridium plug will realizea very long lifetime.

Equipped onToyota’s SIENTAand CROWN asgenuine partssince 2003.

D14L26.516

TOYOTA

Platinum plugPlatinum plug

PK20R11EX.

Double-electrode platinum plugPlatinum plug

PK20TR11・PK20PTR-S9EX.

34

The plugs configuration

0.55 mm diameterIridium

0.7 mm diameterPlatinum

Super ignition, 12 mm dia., long-reach shroud iridium plugIridium plug

FXE20HE11EX.

Platinum is used for both the centerand ground electrodes.

Mileage, drivability, and durabilityare improved by using a finer centerelectrode with a platinum tip.

D14L19 16 TOYOTA / DAIHATSU

Platinum tip is mounted on both thecenter and ground electrodes.

The double-electrode structurereduces the voltage required forpositive discharges.

D14L19 16 TOYOTA / DAIHATSU

Platinum tip

12.7mm

6.3mm

12.7mm

6.3mm

12.7mm

6.3mm

D12 × L26.5 ×　 14

Threaddiameter length Hex size

Super Ignition Plug The needle-shaped

ground electrode ofthis revolutionaryiridium plug featuresDENSO’s ownexclusive technology,resulting in anunparalleledreduction ofquenching effect.

Equipped as originalparts on Nissan’sTIIDA and NOTE

D12L26.5 14 NISSAN

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Compact head plugMotorcycle plugs

W27EMR-CEX.

Plug with compactinsulator head

D14L1920.6

HONDA / SUZUKI

12 mm dia. shroud plugMotorcycle plugs

X24GP-UEX.

12 mm dia. 19 mm plugMotorcycle plugs

X24EPR-UEX.

D12L19 18 HONDA / SUZUKI /

YAMAHA

10 mm dia. plug with half-sizedthreads and stainless steel gasket

Motorcycle plugs

U24FER9SEX.

D10L (6.3 +12.7) 16

HONDA

10 mm dia. plug with half-sized threadsMotorcycle plugs

U27FER9EX.

With its widerspark gap of 0.9mm compared toconventional plugs(0.6 to 0.7 mm),this plug hasimprovedignitability.

D10L (6.3 +12.7 16

HONDA

10 mm dia. double-electrode plugMotorcycle plugs

U31ETREX.

10 mm dia. 19 mm plugMotorcycle plugs

U27ESR-NEX.

Increasing theprojection lengthby 0.5 mmimprovesresistance tofouling.

D10L19 16 YAMAHA /

KAWASAKI /SUZUKI

10 mm dia. 12.7 mm plugMotorcycle plugs

U20FSR-UEX.

D10L12.716

HONDA / YAMAHA/ SUZUKI

8 mm dia. plugMotorcycle plugs

Y27FER-CEX.

D8L (6.3 +12.7) 13

HONDA

Taper seat plugCars & trucks plugs

T16EPR-UEX.

This plug may beinstalled only innon-Japanesecars and has nogasket.

D14L17.516

GM, Ford

12 mm diameter long-reach plugwith 14 mm hex size

Cars & trucks plugs

XE20HR-U9EX.

D12L26.514

RENAULT

12 mm dia. plugCars & trucks plugs

XU22EPR-UEX.

By reducing thehex size (16 mm),this plug may beused in lightvehicles. Threaddiameter is 12mm.

D12L19 16 SUZUKI /

MITSUBISHI

12 mm long-reach plugCars & trucks plugs

XU22HR9EX.

D12L26.516

DAIHATSU

Triple-electrode plugCars & trucks plugs

K22PB・W20EPBEX.

Double-electrode semi-surface plugCars & trucks plugs

W20ETR-S11EX.

Extended plugCars & trucks plugs

KJ20CR-L11EX.

Extended plugCars & trucks plugs

KJ20CR11・KJ16CR-U11EX.

Extended shroud plugCars & trucks plugs

KJ20DR-M11・KJ20DR-M11S

EX.

D14L1916

HONDA

Small hex plugCars & trucks plugs

Q16R-U11・Q16PR-U11EX.

By reducingthe hex size(16 mm), thisplug is lighterin weight.

D14L1916

TOYOTA, andothers

ISO-compatible small hex plugCars & trucks plugs

K16R-U11・K16PR-U11EX.

Compatiblewith ISOstandards

* SKJ20DR-M11Swith stainlesssteel gasket

φ14L1916

TOYOTA, andothers

35

ISOTYPE

The tip of the ground electrode has ataper-cut, and the center electrode ismade finer for improved ignitability.

D14L19 16 HONDA

With this new supplementary gap,resistance to fouling is improved.

D14L19 20.6 TOYOTA, DAIHATSU

Durability is improved with threeground electrodes.

D14L19 16 (K22PB) AUDI / VW / CITROEN / FIAT /

MERCEDES-BENZ / RENAULT

D12L (19 + 3) 18 HONDA

With two ground electrodes, heatresistance is improved.

D10L19 16 KAWASAKI / SUZUKI

KJ20CR11: no U-GrooveKJ20CR-U: with U-Groove

D14L19 16 MAZDA, MITSUBISHI

50.5mm 53mm

5mm 5mm

12.7mm

6.3mm

3mm

19mm

12.7mm

6.3mm

http://www.globaldenso.com/PLUG/M

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IDENTIFYING DENSO PLUGSIridium Plugs / Platinum Plugs / Normal Plugs

Series (Power, Tough, Plus)

Type of precious metal Thread Diameter andHex Size Heat Range Reach Shape (Type) Shape (Type) Gap

ＣＨＡＭＰＩＯＮ

ＢＯＳＣＨ

ＮＧＫ

ＤＥＮＳＯ

4

9 2 18 10

14 4 16,14 9

16 5 12,11 8

20 6 10,9 7,6

22 7 8,7 5

24 8 6,63,61 4

27 9 4,59 3

29 9.5 57

31 10 55 2

32 10.5 53

34 11

35 11.5

F ......Center: 0.55 mmdiameter iridiumGround electrode:0.7 mm diameterplatinum

P......Platinum plugS......0.7 mm diameter

iridiumSV ...0.4 mm diameter

iridiumZ......0.55 mm diameter

iridium

High Performance Plug Thread Diameter, Reach, and Hex Size Heat Range Type

DENSO NGK CHAMPION BOSCH

16 5 12,11 8

20 6 10,9 7,6

22 7 8,7 5

24 8 6,63,61 4

27 9 4,59 3

29 9.5 57

31 10 55 2

32 10.5 53

34 11

35 11.5

WK

1620

E -U-A

XRPR

C .....................1214.0L .....................1822.2

(Reach: 12 mm)M ....................1825.4

(Reach: 12 mm)MA .................1820.6

(Taper seat, Reach: 12 mm)MW ................1820.6

(Reach: 12 mm)J......................1420.6

(Projected plug)K .....................1426.0

(ISO Small Hex plug)KJ...................1416.0(ISO Projected Small Hex

plug)LP ...................1420.6(Plug for LPG applications)N .....................1016.0Q.....................1416.0

(Small Hex plug)QJ...................1416.0

(Projected Small Hexplug)

QL ..................1420.6(Small Hex long housing

plug)S .....................1420.6

(Surface gap orRotary)

T .....................1416.0(Taper seat)

TR...................1420.6(For marine applications)

W ....................1420.6W ....................1419.0

(Compact type)X .....................1218.0XE...................1214.0XU ..................1216.0U .....................1016.0Y .......................813.0Z ................1/2PF23.8

A .....................19.0 mm(Electrode position: 7.0 mm)A .....................21.5 mmB .....................19.0 mm(Electrode position: 9.5 mm)C .....................19.0 mm(Electrode position: 5.0 mm)D .....................19.0 mm

(Shroud 1.5)E (With gasket)E ....................19.0 mmE ....................20.0 mmE (Taper seat)E ....................19.0 mmF .....................12.7 mmFE ...................19.0 mm

(Half thread)G .....................19.0 mm

(Shroud 2.8)G .....................19.0 mm

(Shroud 3)H .....................19.0 mm(Electrode position: 8.5 mm)H .....................26.5 mmL .....................11.2 mmM ......................8.6 mmN (Taper seat, Half thread)N ....................17.5 mmV (Taper seat)V .....................25.0 mmNone................9.5 mm

11.2 mm19.0 mm21.5 mm

None (Taper seat).......................8.3 mm

11.2 mm

-A ....Specialspecification

-B ....Specialspecification

-C....Cut-back groundelectrode

-E ....Specialspecification

-F ....Specialspecification

-G....Grease applied onto threads, for CNGapplications

-GL .Platinum centerelectrode

-L ....Heat resistantground electrode

-L ....Thin centerelectrode

-L ....3.5 mm projectedinsulator formotorcycles

-L ....Retracted insulatorfor motorcycles

-M ...Larger groundelectrode

-N....For Yamaha andKawasaki

-P ....A double layer ofplatinum Groundelectrode

-P ....Single platinum-R....10K ohm resistor

plug-S ....Semi-surface gap

discharge type-S ....Stainless gasket-TP..Taper-cut, single

platinum plug-U....U-Groove ground

electrode-US .Star-shaped center

electrode-V ....1.3 mm diameter,

nickel centerelectrode

-Z ....Taper cut-ZU .ZU Plug

05 ........0.5 mm (.020 )08 ........0.8 mm (.032 )09 ........0.9 mm (.035 )10 ........1.0 mm (.040 )11 ........1.1 mm (.044 )13 ........1.3 mm (.050 )14 ........1.4 mm (.055 )15 ........1.5 mm (.060 )20 ........2.0 mm (.080 )<None> Cars: 0.8 mm

M.C: 0.7 mm<Exceptions> P16R,

PQ16R, PQ20Rare 1.1 mm

A......Double groundelectrodes

A......Slant groundelectrode (For racing)

AY ...Double groundelectrodes withbent shape(special)

B .....Triple groundelectrodes

BG ..Triple ground electrodes(shrouded)

C .....Shroud 1.5D .....Quadruple ground

electrodesD .....Projected

(2.0 mm projection)D .....Projected

(1.5 mm projection,spark position 3.5 mm)

E......Shroud: 25K .....Projected

(1 mm projection)LM ..Compact type

(Hex size: 20.6 mm)M.....Shortened insulator

head lengthM.....Compact type

(Hex size: 19.0 mm)P......Projected

(1.5 mm projection)Q .....Projected 2mm,

Spark position 3.5mmR .....5Kohm resistor plugS......Non-projected

(0 mm Projection)S......Single IridiumT ......Double ground

electrodesTM ..Double ground

electrodesTN ...Double ground

electrodesV......Slant ground

electrodesX......Full projected

(2.5 mm Projection)

U 27

I .......0.4 mm diameter iridiumV......0.4 mm diameter iridium with platinum tip K ......1419.016.0

KA....1419.0 (Shrouded, New TripleElectrodes)16.0

KB....1419.0 (New Triple Electrodes)16.0KD....1419.0 (Shrouded)16.0KH....1426.516.0NH....1019.0 (Half Thread)16.0T ......1417.5 (Taper Seat)16.0TF ....1411.2 (Taper Seat)16.0TL ....1425.0 (Taper Seat, Long Insulator)16.0TV ....1425.0 (Taper Seat)16.0Q ......1419.016.0U ......1019.016.0UF ....1012.716.0UH....1019.0 (Half Thread)16.0W .....1419.020.6WF ...1412.720.6WM ..1419.020.6 (Compact Insulator)X ......1219.018.0XG....1219.0 (Shrouded)18.0XU....1219.016.0Y ......819.0 (Half Thread)13.0

A......Slant electrode, No U-Groove,No taper cut

B .....Projected insulator (1.5 mm)C .....No U-GrooveD .....No U-Groove, lnconel ground

electrodeES ...Stainless steel gasketF ......SpecialG .....Stainless steel gasketJ ......Spark position: 5 mmK .....Spark position: 4 mmL ......Spark position: 5 mmT ......For LPG applicationsY......0.8 mm gapZ......Taper cut

<Thread Diameter Reach Hex Size> (mm)

BASIC INFORMATION FOR

PLUG (1)

DENSO spark plugs ignite your engine.

The role of spark plugs

Gasoline engines generate power from the precision-timing combustion of a fuel-air mixture of gasoline and oxygen. However, gasoline itself is relatively difficult to ignite with the precision timing required for combustion of the fuel-air mixture, even at high temperatures. The role of the spark plug is to create a spark which ignites the fuel. Since the spark plug ignites combustion, the performance of the plug determines the performance of the entire engine. The engine is often likened to the “heart of a vehicle,” and spark plugs have the significant role as the “heart of the engine.”

01

Generate a strong spark from an electrical discharge between electrodes

Spark and Ignition

When high voltage produced by the ignition system is discharged between the center electrode and ground electrode of the spark plug, the natural insulation between the two electrodes breaks down, current flows as a result of the discharge phenomenon, and an electrical spark is generated. The energy from this spark triggers the igniting and combustion of the compressed air-fuel mixture. The duration of this discharge is extremely brief (about 1/1,000 of a second) and is extraordinarily complex.

The role of the spark plug is to reliably generate a strong spark between electrodes precisely at each specific moment to create the trigger for combustion of the gaseous mixture.

The spark plug generates a flame kernel from a spark which then ignites the fuelIgniting the fuel with an electrical spark occurs because fuel particles situated between the electrodes are activated by the discharge spark to trigger a chemical reaction (oxidation), the reaction generates heat, and a flame kernel is formed. This heat ignites the surrounding air-fuel mixture until a flame core is formed that spreads combustion throughout the chamber.However, the electrodes themselves absorb heat which can extinguish the flame kernel, called the “quenching effect.” If the quenching effect between the electrodes is greater than the heat generated by the flame kernel, the flame is extinguished and combustion stops.If the plug gap is wide, the flame kernel will be larger and the quenching effect is reduced, so reliable ignition can be expected. But if the gap is too wide, a large discharge voltage becomes necessary, the limits of coil performance are exceeded, and discharge becomes impossible.

02

Center Electrode 1

1

Ground Electrode2

2

Flame kernel3

3

Heat absorption4

4

4

Flame propagation5

5

Generating a flame kernel

Spark / Ignition

CenterElectrode

GroundElectrode

Spark

Quenching effect

Spark plugs arethe heart ofyour engine!




SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

37

04

100%

38%

20%

20%

10%

80%

10%

2%

11

2

11

22

33

44 55

1000

800

600

400

T

S

（）

Spark plug heat dispersal

What is a spark plug’s heat range ?

How to Choose a Plug

Various circumstances such as engine conditions and driving conditions are rough measures for choosing a plug. For example, if strenuous driving is continued for a long time using normal plugs, the plug will overheat. This is why the idea of a regular plug for a regular car doesn’t work. What’s important is to inspect the condition of your current plugs, and then choose a plug accordingly.

The degree to which a spark plug disperses the heat it receives is called its "heat range". Spark plugs with a high degree of heat dispersal are called high heat range (cold type) and those with a low degree of heat dispersal are called low heat range (hot type).

This is largely determined by the temperature of the gas inside the combustion chamber and the spark plug design.

The heat range will change with the seasons.

When the air temperature is high, as in the summer, the inlet air temperature becomes higher, increasing the load on the engine. In times like this, it's better to choose a plug with a higher heat range.

The more horsepower is increased, the higher the required heat range.

If the horsepower has been increased through tuning, the increase in explosive power leads to an increase in combustion chamber temperature, making pre-ignition more likely; in such cases it is necessary to choose a plug with a higher heat range and a higher level of heat resistance.

Glossary of spark plug terms

Low heat range and high heat rangeLow heat range plugs have long insulator leg sections and the surface area affected by the flame and the gas pocket capacity are large. Also, since the heat release path from the insulator leg section to the housing is long, heat dispersal is low and the temperature of the center electrode rises easily. On the other hand, high heat range plugs have short insulator legs and the surface area affected by the flame and the gas pocket capacity are small.Also since the heat release path from the insulator leg section to the housing is short, heat dispersal is high and the temperature of the center electrode does not rise easily.

The relationship between the spark plug temperature and vehicle speed and heat rangeThere are restrictions on the temperatures at which spark plugs can be used: the lower limit is the self-cleaning temperature and the upper limit is the pre-ignition temperature.A spark plug only functions completely when its center electrode temperature is between these temperatures of about 500°C and 950°C.

Water1Cooled by intake air-tuel mixture2

Low heatrange(hot type)

spark plugs

High heatrange(cold type)spark plugs

Gas pocket

Self-cleaning temperature1 Pre-ignition temperature2Low heat range (hot type) spark plugs3 Standard spark plugs4High heat range (cold type) spark plugs

S: Vehicle speed T: Spark plug temperature (°C)5

HeatRange

31

27

24

22

20

To prevent plug overheat

Standard Plugs

Level of TuningLow High

To prevent carbon fouling/ oil fouling

Application

16 20 22 24 2714

03


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA

PHILIPPINES

SAUDIARABIA

SINGAPORE

TAIWAN

THAILAND

JAPAN

MOTOR

CYCLE

SMALL

ENGINE

CROSS

REFERENCE

PART

NUMBER

EUROPE

&USA

38

BASIC INFORMATION FOR

PLUG (2)

Failure Modes of Spark Plugs

Condition

Appearance

Engine

Causes

Solve theproblem

Solve theproblem

Normal Carbon fouling Oil fouling

When using unleaded gasoline, the base of the insulator often becomes white or gray. The electrode may become slightly burned. When using leaded gasoline, the base of the insulator becomes light brown.

The engine runs in excellent condition when starting or driving, both at high or low speeds.

Dried carbon is deposited, covering the insulation base and electrode area.

Engine startability worsens and “misses” at low speeds. If not corrected, the engine may die often and have poor acceleration.(Nearly 90% of engine trouble from spark plugs is caused by carbon fouling or oil fouling.)

1. Inappropriate thermal value2. Engine idling for a long time, or driving

in low temperatures3. Rich air-fuel mixture4. Clogged air filter5. Delay in ignition timing

1 or 2: Use a spark plug with a thermal value that is one level lower, or adjust engine idling

3 to 5: Perform complete readjustment and tune-up

The base of the insulator and electrode become shiny black, covered with oil or gasoline.

Engine startability worsens and “misses” at low speeds. If not corrected, the engine may die often and have poor acceleration.(Nearly 90% of engine trouble from spark plugs is caused by carbon fouling or oil fouling.)

1. Oil leakage into the combustion chamber due to frictional wear of the piston rings, valve guides, or cylinder wall.

2. Rich air-fuel mixture

1. Spark plugs may become wet until the oil flow control becomes normal during pre-conditioning runs with a new engine or an engine immediately after an overhaul. In such cases, simply clean the plug and reinstall it. In other cases, the engine basically requires a complete overhaul.

2. Adjust the carburetor.

Condition

Appearance

Engine

Causes

Overheating Pre-ignition Insulator breakage

The base of the insulator will be burned and become bleach white from the heat. The electrode will also be burned and become white or dark purple. Electrodes will wear out soon.

Engine horsepower decreases and speed falls when running continuously at high speeds, driving for a long time uphill, or pulling too great a load.

1. Inappropriate thermal value of plug2. Use of low octane gasoline3. Ignition timing set too early 4. Inappropriate cooling5. Poor air-fuel mixture

1. Use a spark plug with a higher thermal value

2. Use higher octane gasoline3. Adjust the ignition timing4. Check the cooling system5. Adjust the carburetor

The electrode will be melted. In extreme cases, the base of the insulator is also melted.

This is caused by overheating. Temperatures in the combustion chamber increase rapidly, destroying not only the spark plug, but the piston head also.

1. Inappropriate thermal value of plug2. Use of low octane gasoline3. Ignition timing set too early4. Inappropriate cooling5. Poor air-fuel mixture


2. Use higher octane gasoline3. Adjust the ignition timing4. Check the cooling system5. Adjust the carburetor

The base of the insulator has a vertical crack. The appearance of the spark plug is similar to problems with overheating or lead fouling.

Engine horsepower decreases and speed falls when running continuously at high speeds, driving for a long time uphill, or pulling too great a load.

1. Inappropriate thermal value of plug2. Ignition timing set too early3. Inappropriate cooling4. Poor air-fuel mixture


2. Adjust the ignition timing3. Check the cooling system4. Adjust the carburetor

04


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

39

Recommended Torque and Tightening Angle for DENSO plugs

Use the correct wrench for the hex on the plug, and be careful not to damage the insulator.

(*1) IUH27ES, U24FER9S

(*2) PK22PR-L11S, SK22PR-M11S, IK16G, IK20G,

IK22G, VK16G, VK20G, VK22G, K20PR-U9S,

SK20PR-L9S, SKJ20DR-M11S

Warnings for Your Safety and Instructions for Use

1When changing, make sure that the oil, etc. on the outside of the plug does not enter the engine interior.

2When putting the plugs in, clean the engine side of the flange, and put in the plugs after making sure the gasket is in the flange.

3

Then, use a plug wrench to tighten them accurately to the torque or rotation angle showed in the chart below.

5Make sure the plugs are vertical, and tighten them by hand until they cannot be tightened any further.

4

When the product is installed on an altered or modified vehicle engine, the product may be struck by valves, pistons, or other parts and cause damage.Please do not drop the plug onto a floor, or similar hard surfaces. It may cause internal cracks or alter the spark gap, damaging the functions of the plug.Before using the product, please carefully read the instructions on the reverse side of the package and use the product appropriately as described.

Before changing or adjusting the plug, please switch off the engine first. Otherwise, it may cause a fire or an electrical shock.Warning

Instructions for Use

When using a plug with a terminal nut, please tighten the nut securely with a pair of pliers or a similar tool. If the terminal nut is crimped onto the plug, the nut may loosen during use due to vibration. Therefore, we recommend that you check it regularly. If the terminal nut becomes loose, please tighten it securely. If you use the plug with a loose terminal nut, it may be a cause of engine malfunction.

When using a plug with a terminal nut

If the center electrode tip becomes worn into a rounded shape, it is possible that the sparks it produces are not fully efficient, resulting in the fuel-air mixture being ignited less reliably. If this happens, the engine horsepower decreases, fuel consumption worsens, and the engine lifetime may be adversely affected. We therefore recommend the regular replacement of spark plugs.*Service lifetime is a guideline. When used in a vehicle equipped with a simultaneous ignition system or high energy coil, the service lifetime may be shorter.

*Note: Use in a small-engine vehicle, a tuning vehicle, that are usually operated under high-rpm conditions may result in a shortened lifetime of the plug.

When to replace spark plugs

The service lifetime of a spark plug may be shortened due to driving conditions or ignition properties when used in a vehicle equipped with a simultaneous ignition system (plus-minus discharge and D-DLI ). Please ask your dealer to check if your vehicle is equipped with a simultaneous ignition system.A simultaneous ignition system, as shown in the images, has two plug wires connected to a single coil.

Service Lifetime

If a thread lubricant such as grease is coated on the thread, tightening to the recommended torque is tightening too much; this has been linked to seal leakage. Do not use a thread lubricant.

Tightening more than the tightening angles and torques shown on the left could result in damage to the engine and furthermore could result in the plug coming off at the thread.

Thread Size Applicable Models RecommendedTorque New Plug

Recommended Tightening Angle

Previously Used

M 8

M10

M10

M10

M12

M14

M14

M18M14

M18

All Types

Types other than the ones shown below

UFE, IUH, VUH, VNH Types

Stainless Gasket Type (*1)

All Types

Types other than the ones shown below

Stainless Gasket Type (*2)

All Types

All Types

All Types

8 -10N•m

10-15N•m

10-15N•m

10-15N•m

15-20N•m

20-30N•m

20-30N•m

30-40N•m

20-30N•m

30-40N•m

About 1 turn

About 1/3 turn

About 2/3 turn

About 3/4 turn

About 1/3 turn

About 1/2 turn

About 2/3 turn

About 1/4 turn

About 1/16 turn

About 1/16 turn

About 1/12 turn

About 1/12 turn

About 1/12 turn

About 1/12 turn

About 1/12 turn

About 1/12 turn

About 1/12 turn

About 1/12 turn

About 1/16 turn

About 1/16 turnTaper seat

Taper seat

Light automobiles

Motorcycles

Automobiles 15,000 to 20,000 km

7,000 to 10,000 km

3,000 to 5,000 km

Recommended replacement guidelines (service lifetime) for ordinary plugs and

Motorcycles

Automobiles up to 100,000 km* (see note)

no established guidelines

Recommended replacement guidelines (service lifetime) for platinum plugs, , and

When choosing a spark plug, please confirm the specifications in your vehicle's manual, maintenance manual, and matching chart by automobile manufacturers in this book, in order to choose the appropriate plug for size and thermal value. The heat range of the plug needs to be increased, such as from No. 16 to 20 or 22, depending on the degree of tuning if your automobile has a rebuilt engine or is equipped with any of the following parts that have been modified: muffler, ignition coil, spark plug wires, turbo engine, commercial electric ignition system, NOS, etc. When the correct plug is not installed, it may generate fuel fouling, exhaust smoke, or pre-ignition, and cause failure of your automobile. Please check page 35 for the correct thermal value to use, and page 36 that lists some failure modes of spark plugs.

How to select a spark plug; failure modes

is for racing and tuning vehicles. Please choose a plug heat range that is suitable to the level of tuning, based upon the heat range of an normal plug and .Generally, electrodes that protrude into a combustion chamber have better ignitability and better performance. However, due to more exposure to high temperature

combustion gases and because the ground electrode is longer, heat resistance and durability are decreased. The higher the level of tuning, the greater need there is to use a less-projecting plug type.As the level of tuning is increased, so does the need for a higher heat range tolerance.

How to choose a racing plug

For ordinary plugs, please adjust the gap if it has widened at the time of inspecting the plug. Please adjust it to the specified gap of each automobile manufacturer.If the center electrode has become rounded, or worn only on its edges, please replace it with a new product.Please do not adjust the spark gap of any plug with a fine electrode, such as a platinum or iridium plug. Any adjustment may damage the center electrode.

Adjustment of the spark gap

R


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA

PHILIPPINES

SAUDIARABIA

SINGAPORE

TAIWAN

THAILAND

JAPAN

MOTOR

CYCLE

SMALL

ENGINE

CROSS

REFERENCE

PART

NUMBER

EUROPE

&USA

40

Counterfeit auto parts can cause fatal accidents!Don’t produce them! Don’t sell them! Don’t buy them!

¡La falsificación de piezas de automóviles puede causar accidentes mortales!¡No las produzca! ¡No las venda! ¡No las compre!

If you find any counterfeit parts, please contact us at "[email protected]"

Beware of DENSO spark plugs. They will cause various kinds of problems!

FAKE

SectionAppearance

Quick heat dissipation.

Slow heat dissipation.

If you find any counterfeit parts, please contact us at "[email protected]"

Beware of DENSO spark plugs. They will cause various kinds of problems!

FAKE

Absence of a copper-core center electrode results in poor heat dissipation capability. Prolonged use causes power loss due to excessive heat buildup. This results in melt down of the ground electrode, eventually leading to serious engine damage.

HousingPoor surface finish.

Fake Fake

Markings

Terminal

Printed wording can be scraped off.

Terminal has a glossy finish.

Screws & ElectrodePoor thread quality and finish.

Comparison of DENSO and Fake

Center Electrode

Ceramic Insulator

A genuine DENSO spark plug has a copper-core center electrode with excellent heat conductivity. A fake DENSO spark plug does not, retaining heat that causes meltdown.

Poorly manufactured ceramic insulator with visible air bubbles trapped within which affect heat dissipation capability.

SectionSectionAppearanceAppearance

Problems Caused by Fake Spark Plugs Why Power Drops and Melting Occurs

Meltdown

DENSO plug contains copper core

Fake plug is iron only

Copper is an excellent heat conductor. High temperature heat is quickly dissipated away from the center-electrode to prevent melt down.

Quick heat dissipation.

Slow heat dissipation.

Fake

Comparison Between GenuineDENSO and Fake Spark Plugs

The plug melts down.

Engine power drops onuphill roads and highways.

(See below)

Inconsistent sparking causes incomplete combustion. Unburned fuel forms a black sooty deposit on the spark plug, eventually leading to poor fuel economy and poor start up of the engine.

Poor heat dissipation due to the lack of a copper-core center electrode causes pre-ignition. As a result, engine power drops under highway driving or uphill driving conditions.

Continued usage of an overheated plug will damage the electrodes.

Fuel economy is diminished.


SPORTS

CHINA

INDONESIA

KOREA

MALAYSIA


SINGAPORETAIWAN

THAILANDJAPAN

MOTOR

CYCLE

SMALL

ENGINECROSS

REFERENCEPART

NUMBER

EUROPE

&USA

43

Victory

10010B-002　709-6APrinted on 100% recycled paper.Printed in Japan.

For purchase or for inquiries, please contact…

1-1,Showa-cho,Kariya,Aichi 448-8661,Japan

Victory

Documents

DENSO Spark Plug Catalog