NGK MR8F Spark Plug

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Rating

2.9 / 5 Overall
NGK	MR8F
Brand	Code
3.0 / 5 Materials
Copper	Copper
Ground electrode	Center electrode
2.8 / 5 Design
Standard	Standard
Ground type	Center type

Specifications

0.8mm (.031")	8
Gap	Heat range
⌀10mm	1mm
Thread diameter	Thread pitch
19mm (3/4")	16mm (5/8")
Reach	Hex size
Gasket	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

Bigger gap (4)

0.1..0.3 mm gap increase for better performance given your ignition system can handle it

CR8EHIX-9

Copper-Iridium

3.8/ 5

.035"19mm, ⌀10x1HR 8

CPR8EAIX-9

Copper-Iridium

3.8/ 5

.035"19mm, ⌀10x1HR 8

CPR8EA-9

Copper

-

2.9/ 5

.035"19mm, ⌀10x1HR 8

CPR8EB-9

Copper

-

2.9/ 5

.035"19mm, ⌀10x1HR 8

One step colder (1)

Colder spark plugs with same characteristics for moderately tuned engines (75–100 hp increase)

MR9F

Copper

-

2.9/ 5

.031"19mm, ⌀10x1HR 9