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NGK 6637 Spark Plug


Brand:	NGK
Part Number:	6637
UPC:	00087295166376
Weight:	0.06 lbs
Condition:	New

On Sale:

$7.53

Availability:

21 in Stock

Warehouse:

US-4

Quantity:

Product Information

Description:

Get the NGK 6637 Spark Plug for your vehicle. Buy now and secure your purchase online!

NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

Features and Benefits:

IRIDIUM ALLOY CENTER ELECTRODE: Iridium's density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal

Specifications:

Center Electrode Core Material:

Copper

Center Electrode Tip Material:

Iridium

Electrical Terminal Type:

Removable Nut

Ground Configuration:

Standard

Ground Electrode Core Material:

Nickel

Ground Electrode Quantity:

Ground Electrode Tip Design:

Taper Cut

Hex Size:

13/16 in.

Insulator Height:

55.00 mm

Manufacturer Heat Range:

Part Number:

BPR6EIX

Pre-Gap Size:

.032 in.

Reach:

.75 in.

Resistance:

5000.0 Ohm

Seat Type:

Flat

Stock Number:

6637

Thread Diameter:

14.00 mm

Autolite #:

XP63

Autolite #:

XP63DP2

Autolite #:

XP64

Autolite #:

XP64DP2

Autolite #:

XS63

Autolite #:

XS63DP

Beck/Arnley #:

1765184

Bosch #:

4216

Bosch #:

4225

Bosch #:

4310

Bosch #:

4477

Bosch #:

4506

Bosch #:

4510

Bosch #:

W6DP

Bosch #:

W6DP0

Bosch #:

W7DP

Bosch #:

WGR7DDP

Bosch #:

WGR7DQI

Bosch #:

WGR8DQI

Bosch #:

WR6DP

Bosch #:

WR6DS

Bosch #:

WR7DDC4

Bosch #:

WR7DP

Bosch #:

WR7DS

Champion Spark Plug #:

247

Champion Spark Plug #:

248

Champion Spark Plug #:

N10PY

Champion Spark Plug #:

N8GY

Champion Spark Plug #:

RN10GY

Champion Spark Plug #:

RN79PYP17

Champion Spark Plug #:

RN79PYP25

Champion Spark Plug #:

RN9GY

DENSO Auto Parts #:

3045

DENSO Auto Parts #:

3065

DENSO Auto Parts #:

3116

DENSO Auto Parts #:

3291

DENSO Auto Parts #:

4709

DENSO Auto Parts #:

5306

DENSO Auto Parts #:

5502

DENSO Auto Parts #:

IW20

DENSO Auto Parts #:

IW20TT

DENSO Auto Parts #:

P20PR-S11

DENSO Auto Parts #:

VW20T

DENSO Auto Parts #:

W20EP-GU

DENSO Auto Parts #:

W20EP-ZU

DENSO Auto Parts #:

W20EPR-ZU

DENSO Auto Parts #:

W20EX-ZU

DENSO Auto Parts #:

W20EXR-ZU

Daihatsu #:

999-06910-X9-027

Mazda #:

1UN1-18-110

Mitsubishi #:

MZ602071

NGK #:

6637

Nissan #:

BY480-BPR6E

Suzuki #:

99000-79K60-P6R

Torch #:

8012

Torch #:

F6RTI

Torch #:

F6RTP

Yamaha #:

90793-20117

Yamaha #:

90793-20168

Country of Origin:

Manufacturer Warranty:

2 Months

Select a vehicle to narrow NGK 6637 Spark Plug fitment info!

Last Updated: 09/02/2024

Years

Vehicle

Per Vehicle

Position

Fit Notes

Fitment Notes

1967

Alfa Romeo 2600

2.6L L6 Gas

6 Iridium IX Spark Plug
Gap 0.025

Alfa Romeo 2600

2.6L L6 Gas Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Alfa Romeo Alfetta

2.0L L4 Gas DOHC

4 Iridium IX Spark Plug
Gap 0.025

Alfa Romeo Alfetta

2.0L L4 Gas DOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Alfa Romeo GTV-6

2.5L V6 Gas SOHC

6 Iridium IX Spark Plug
Gap 0.025

Alfa Romeo GTV-6

2.5L V6 Gas SOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Alfa Romeo Milano

2.5L V6 Gas SOHC

6 Iridium IX Spark Plug
Gap 0.025

Alfa Romeo Milano

2.5L V6 Gas SOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Alfa Romeo Montreal

2.6L V8 Gas DOHC

8 Iridium IX Spark Plug
Gap 0.025

Alfa Romeo Montreal

2.6L V8 Gas DOHC Iridium IX Spark Plug
Gap 0.025

8 Per Vehicle

Alfa Romeo Sport

2.0L L4 Gas DOHC

4 Iridium IX Spark Plug
Gap 0.025

Alfa Romeo Sport

2.0L L4 Gas DOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Alfa Romeo Sprint

2.0L L4 Gas DOHC

4 Iridium IX Spark Plug
Gap 0.025

Alfa Romeo Sprint

2.0L L4 Gas DOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Arctic Cat AC 120 Sno Pro

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

Arctic Cat AC 120 Sno Pro

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

2006

Arctic Cat F120

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

Arctic Cat F120

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

2020

Arctic Cat Prowler Pro

-L U/K

3 Iridium IX Spark Plug
Gap 0.036

Arctic Cat Prowler Pro

-L U/K Iridium IX Spark Plug
Gap 0.036

3 Per Vehicle

2020

Arctic Cat Prowler Pro Crew

-L U/K

3 Iridium IX Spark Plug
Gap 0.036

Arctic Cat Prowler Pro Crew

-L U/K Iridium IX Spark Plug
Gap 0.036

3 Per Vehicle

Arctic Cat Z 120

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

Arctic Cat Z 120

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

2001

Arctic Cat Z 120 Sno Pro

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

Arctic Cat Z 120 Sno Pro

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

Arctic Cat ZR 120

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

Arctic Cat ZR 120

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

Aston Martin DB4

3.7L L6 Gas

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DB4

3.7L L6 Gas Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Aston Martin DB4

4.0L L6 Gas DOHC

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DB4

4.0L L6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Aston Martin DB4

3.7L L6 Gas DOHC

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DB4

3.7L L6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Aston Martin DB5

4.0L L6 Gas

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DB5

4.0L L6 Gas Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Aston Martin DB5

4.0L L6 Gas DOHC

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DB5

4.0L L6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Aston Martin DB6

4.0L L6 Gas DOHC

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DB6

4.0L L6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Aston Martin DB6

4.0L L6 Gas

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DB6

4.0L L6 Gas Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

1971

Aston Martin DBS

5.3L V8 Gas DOHC

8 Iridium IX Spark Plug
Gap 0.025

Aston Martin DBS

5.3L V8 Gas DOHC Iridium IX Spark Plug
Gap 0.025

8 Per Vehicle

Aston Martin DBS

4.0L L6 Gas DOHC

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DBS

4.0L L6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

1970

Aston Martin DBS

5.3L V8 Gas DOHC

8 Iridium IX Spark Plug
Gap 0.025
Fuel Sys: CARB

Aston Martin DBS

5.3L V8 Gas DOHC Iridium IX Spark Plug
Gap 0.025
Fuel Sys: CARB

8 Per Vehicle

Aston Martin DBS

4.0L L6 Gas

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin DBS

4.0L L6 Gas Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Aston Martin Lagonda

5.3L V8 Gas DOHC

8 Iridium IX Spark Plug
Gap 0.025

Aston Martin Lagonda

5.3L V8 Gas DOHC Iridium IX Spark Plug
Gap 0.025

8 Per Vehicle

1982

Aston Martin V-8

5.3L V8 Gas DOHC

8 Iridium IX Spark Plug
Gap 0.035

Aston Martin V-8

5.3L V8 Gas DOHC Iridium IX Spark Plug
Gap 0.035

8 Per Vehicle

Aston Martin V-8

5.3L V8 Gas DOHC

8 Iridium IX Spark Plug
Gap 0.025

Aston Martin V-8

5.3L V8 Gas DOHC Iridium IX Spark Plug
Gap 0.025

8 Per Vehicle

Aston Martin Vantage

4.0L L6 Gas DOHC

6 Iridium IX Spark Plug
Gap 0.025

Aston Martin Vantage

4.0L L6 Gas DOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Audi 100 Series

1.8L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.028

Audi 100 Series

1.8L L4 Gas OHV Iridium IX Spark Plug
Gap 0.028

4 Per Vehicle

Audi 4000

1.7L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.028

Audi 4000

1.7L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.028

4 Per Vehicle

Audi 4000

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.028

Audi 4000

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.028

5 Per Vehicle

Audi 4000 Quattro

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.032

Audi 4000 Quattro

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.032

5 Per Vehicle

1988

Audi 5000

2.2L L5 Gas SOHC Turbo

5 Iridium IX Spark Plug
Gap 0.032

Audi 5000

2.2L L5 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.032

5 Per Vehicle

1987

Audi 5000

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.028
8th VIN Digit: B

Audi 5000

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.028
8th VIN Digit: B

5 Per Vehicle

1987

Audi 5000

2.2L L5 Gas SOHC Turbo

5 Iridium IX Spark Plug
Gap 0.032
8th VIN Digit: D

Audi 5000

2.2L L5 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.032
8th VIN Digit: D

5 Per Vehicle

1986

Audi 5000

2.2L L5 Gas SOHC Turbo

5 Iridium IX Spark Plug
Gap 0.032

Audi 5000

2.2L L5 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.032

5 Per Vehicle

Audi 5000

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.028

Audi 5000

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.028

5 Per Vehicle

1983

Audi 5000

2.2L L5 Gas SOHC,
2.2L L5 Gas SOHC Turbo

5 Iridium IX Spark Plug
Gap 0.028

Audi 5000

2.2L L5 Gas SOHC,
2.2L L5 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.028

5 Per Vehicle

Audi 5000

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.028
Eng: WE

Audi 5000

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.028
Eng: WE

5 Per Vehicle

Audi 5000

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.032
Eng: WD

Audi 5000

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.032
Eng: WD

5 Per Vehicle

Audi 5000

2.2L L5 Gas SOHC Turbo

5 Iridium IX Spark Plug
Gap 0.032
Eng: WK

Audi 5000

2.2L L5 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.032
Eng: WK

5 Per Vehicle

1980

Audi 5000

2.2L L5 Gas SOHC Turbo

5 Iridium IX Spark Plug
Gap 0.028

Audi 5000

2.2L L5 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.028

5 Per Vehicle

Audi 5000

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.028

Audi 5000

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.028

5 Per Vehicle

1978

Audi 5000

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.028
Eng: WE

Audi 5000

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.028
Eng: WE

5 Per Vehicle

1978

Audi 5000

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.032
Eng: WD

Audi 5000

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.032
Eng: WD

5 Per Vehicle

1986

Audi 5000 Quattro

2.2L L5 Gas SOHC Turbo

5 Iridium IX Spark Plug
Gap 0.032
8th VIN Digit: D

Audi 5000 Quattro

2.2L L5 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.032
8th VIN Digit: D

5 Per Vehicle

1987

Audi Coupe

2.3L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.028

Audi Coupe

2.3L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.028

5 Per Vehicle

Audi Coupe

2.2L L5 Gas SOHC

5 Iridium IX Spark Plug
Gap 0.028

Audi Coupe

2.2L L5 Gas SOHC Iridium IX Spark Plug
Gap 0.028

5 Per Vehicle

Audi Super 90

1.8L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.028

Audi Super 90

1.8L L4 Gas OHV Iridium IX Spark Plug
Gap 0.028

4 Per Vehicle

Austin America

1.3L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin America

1.3L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Austin Marina

1.8L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Marina

1.8L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Austin Mini

0.8L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Mini

0.8L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Austin Mini 850

0.8L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Mini 850

0.8L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Austin Mini Cooper

1.3L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Mini Cooper

1.3L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Austin Mini Cooper

1.0L L4 Gas

4 Iridium IX Spark Plug
Gap 0.025

Austin Mini Cooper

1.0L L4 Gas Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Austin Mini Cooper

1.0L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Mini Cooper

1.0L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

1964

Austin Mini Cooper

1.1L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Mini Cooper

1.1L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Austin Healey 3000

2.9L L6 Gas OHV

6 Iridium IX Spark Plug
Gap 0.025

Austin Healey 3000

2.9L L6 Gas OHV Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Austin Healey Sprite

1.3L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Healey Sprite

1.3L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Austin Healey Sprite

1.1L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Healey Sprite

1.1L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

1962

Austin Healey Sprite

0.9L L4 Gas OHV

4 Iridium IX Spark Plug
Gap 0.025

Austin Healey Sprite

0.9L L4 Gas OHV Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Bertone X-1/9

1.5L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.028

Bertone X-1/9

1.5L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.028

4 Per Vehicle

Bertone X-1/9

2.0L L4 Gas DOHC

4 Iridium IX Spark Plug
Gap 0.028

Bertone X-1/9

2.0L L4 Gas DOHC Iridium IX Spark Plug
Gap 0.028

4 Per Vehicle

BMW 1600

1.6L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 1600

1.6L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 1600-2

1.6L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 1600-2

1.6L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 1600ti

1.6L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 1600ti

1.6L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 1602

1.6L L4 Gas

4 Iridium IX Spark Plug
Gap 0.025

BMW 1602

1.6L L4 Gas Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 1800

1.8L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 1800

1.8L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

1971

BMW 1802

1.8L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 1802

1.8L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2000

2.0L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 2000

2.0L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2000c

2.0L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 2000c

2.0L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2000cs

2.0L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 2000cs

2.0L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2000ti

2.0L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 2000ti

2.0L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2000ti

2.0L L4 Gas

4 Iridium IX Spark Plug
Gap 0.025

BMW 2000ti

2.0L L4 Gas Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2000tii

2.0L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 2000tii

2.0L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2002

2.0L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 2002

2.0L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2002

2.0L L4 Gas SOHC Turbo

4 Iridium IX Spark Plug
Gap 0.025

BMW 2002

2.0L L4 Gas SOHC Turbo Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2002ti

2.0L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 2002ti

2.0L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2002tii

2.0L L4 Gas SOHC

4 Iridium IX Spark Plug
Gap 0.025

BMW 2002tii

2.0L L4 Gas SOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

BMW 2800CS

2.8L L6 Gas SOHC

6 Iridium IX Spark Plug
Gap 0.025

BMW 2800CS

2.8L L6 Gas SOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

1991

BMW R100

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R100

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R100

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R100

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R100/7

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R100/7

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R100CS

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R100CS

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R100GS

-L U/K

1 Iridium IX Spark Plug
Gap 0.024

BMW R100GS

-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

BMW R100GS Paris-Dakar

-L U/K

1 Iridium IX Spark Plug
Gap 0.024

BMW R100GS Paris-Dakar

-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

BMW R100R

-L U/K

1 Iridium IX Spark Plug
Gap 0.024

BMW R100R

-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

BMW R100RS

-L U/K

1 Iridium IX Spark Plug
Gap 0.024

BMW R100RS

-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

BMW R100RT

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R100RT

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R100T

-L U/K

1 Iridium IX Spark Plug
Gap 0.024

BMW R100T

-L U/K Iridium IX Spark Plug
Gap 0.024

1 Per Vehicle

BMW R75/5

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R75/5

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R75/6

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R75/6

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R75/7

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R75/7

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R80

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R80

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R80/7

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R80/7

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R80G/S

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R80G/S

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R80R

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R80R

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

BMW R80RT

-L U/K

1 Iridium IX Spark Plug
Gap 0.028

BMW R80RT

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

See More Fitments on Page 2 - or - Select Your Vehicle Above

NGK 6637 Spark Plug

$7.53

Product Information

Description:

Features and Benefits:

Specifications:

Manufacturer Warranty:

Select a vehicle to narrow NGK 6637 Spark Plug fitment info!

Alfa Romeo 2600 2.6L L6 Gas

6

Iridium IX Spark PlugGap 0.025

Alfa Romeo 2600

2.6L L6 Gas Iridium IX Spark PlugGap 0.025 6 Per Vehicle

Alfa Romeo Alfetta 2.0L L4 Gas DOHC

4

Iridium IX Spark PlugGap 0.025

Alfa Romeo Alfetta

2.0L L4 Gas DOHC Iridium IX Spark PlugGap 0.025 4 Per Vehicle

Alfa Romeo GTV-6 2.5L V6 Gas SOHC

6

Iridium IX Spark PlugGap 0.025

Alfa Romeo GTV-6

2.5L V6 Gas SOHC Iridium IX Spark PlugGap 0.025 6 Per Vehicle

Alfa Romeo Milano 2.5L V6 Gas SOHC

6

Iridium IX Spark PlugGap 0.025

Alfa Romeo Milano

2.5L V6 Gas SOHC Iridium IX Spark PlugGap 0.025 6 Per Vehicle

Alfa Romeo Montreal 2.6L V8 Gas DOHC

8

Iridium IX Spark PlugGap 0.025

Alfa Romeo Montreal

2.6L V8 Gas DOHC Iridium IX Spark PlugGap 0.025 8 Per Vehicle

Alfa Romeo Sport 2.0L L4 Gas DOHC

4

Iridium IX Spark PlugGap 0.025

Alfa Romeo Sport

2.0L L4 Gas DOHC Iridium IX Spark PlugGap 0.025 4 Per Vehicle

Alfa Romeo Sprint 2.0L L4 Gas DOHC

4

Iridium IX Spark PlugGap 0.025

Alfa Romeo Sprint

2.0L L4 Gas DOHC Iridium IX Spark PlugGap 0.025 4 Per Vehicle

Arctic Cat AC 120 Sno Pro -L U/K

1

Iridium IX Spark PlugGap 0.028

Arctic Cat AC 120 Sno Pro

-L U/K Iridium IX Spark PlugGap 0.028 1 Per Vehicle

Arctic Cat F120 -L U/K

1

Iridium IX Spark PlugGap 0.028

Arctic Cat F120

-L U/K Iridium IX Spark PlugGap 0.028 1 Per Vehicle

Arctic Cat Prowler Pro -L U/K

3

Iridium IX Spark PlugGap 0.036

Arctic Cat Prowler Pro

-L U/K Iridium IX Spark PlugGap 0.036 3 Per Vehicle

Arctic Cat Prowler Pro Crew -L U/K

3

Iridium IX Spark PlugGap 0.036

Arctic Cat Prowler Pro Crew

-L U/K Iridium IX Spark PlugGap 0.036 3 Per Vehicle

Arctic Cat Z 120 -L U/K

1

Iridium IX Spark PlugGap 0.028

Arctic Cat Z 120

-L U/K Iridium IX Spark PlugGap 0.028 1 Per Vehicle

Arctic Cat Z 120 Sno Pro -L U/K

1

Iridium IX Spark PlugGap 0.028

Arctic Cat Z 120 Sno Pro

-L U/K Iridium IX Spark PlugGap 0.028 1 Per Vehicle

Arctic Cat ZR 120 -L U/K

1

Iridium IX Spark PlugGap 0.028

Arctic Cat ZR 120

Alfa Romeo 2600

2.6L L6 Gas

Iridium IX Spark Plug
Gap 0.025

2.6L L6 Gas Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Alfa Romeo Alfetta

2.0L L4 Gas DOHC

Iridium IX Spark Plug
Gap 0.025

2.0L L4 Gas DOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Alfa Romeo GTV-6

2.5L V6 Gas SOHC

Iridium IX Spark Plug
Gap 0.025

2.5L V6 Gas SOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Alfa Romeo Milano

2.5L V6 Gas SOHC

Iridium IX Spark Plug
Gap 0.025

2.5L V6 Gas SOHC Iridium IX Spark Plug
Gap 0.025

6 Per Vehicle

Alfa Romeo Montreal

2.6L V8 Gas DOHC

Iridium IX Spark Plug
Gap 0.025

2.6L V8 Gas DOHC Iridium IX Spark Plug
Gap 0.025

8 Per Vehicle

Alfa Romeo Sport

2.0L L4 Gas DOHC

Iridium IX Spark Plug
Gap 0.025

2.0L L4 Gas DOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Alfa Romeo Sprint

2.0L L4 Gas DOHC

Iridium IX Spark Plug
Gap 0.025

2.0L L4 Gas DOHC Iridium IX Spark Plug
Gap 0.025

4 Per Vehicle

Arctic Cat AC 120 Sno Pro

-L U/K

Iridium IX Spark Plug
Gap 0.028

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

Arctic Cat F120

-L U/K

Iridium IX Spark Plug
Gap 0.028

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

Arctic Cat Prowler Pro

-L U/K

Iridium IX Spark Plug
Gap 0.036

-L U/K Iridium IX Spark Plug
Gap 0.036

3 Per Vehicle

Arctic Cat Prowler Pro Crew

-L U/K

Iridium IX Spark Plug
Gap 0.036

-L U/K Iridium IX Spark Plug
Gap 0.036

3 Per Vehicle

Arctic Cat Z 120

-L U/K

Iridium IX Spark Plug
Gap 0.028

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

Arctic Cat Z 120 Sno Pro

-L U/K

Iridium IX Spark Plug
Gap 0.028

-L U/K Iridium IX Spark Plug
Gap 0.028

1 Per Vehicle

Arctic Cat ZR 120

-L U/K

Iridium IX Spark Plug
Gap 0.028