NGK R7440A-9L Spark Plug

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Rating

4.5 / 5 Overall
NGK	R7440A-9L
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
4.5 / 5 Design
Slant	Fine Wire
Ground type	Center type

Specifications

1.2mm (.047")	9
Gap	Heat range
⌀14mm	1.25mm
Thread diameter	Thread pitch
21mm (.827")	21mm (13/16")
Reach	Hex size
Gasket	Solid
Seat	Terminal
1	Non-Projected
Ground count	Projection

Cross-reference and alternatives

One step colder (1)

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

R7440A-10L

Iridium-Platinum

-

4.5/ 5

.047"21mm, ⌀14x1.25HR 10