NGK SILMAR9A9S Spark Plug

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Rating

4.4 / 5 Overall
NGK	SILMAR9A9S
Brand	Code
4.5 / 5 Materials
Platinum	Iridium
Ground electrode	Center electrode
4.3 / 5 Design
Square	Fine Wire
Ground type	Center type

Specifications

0.9mm (.035")	9
Gap	Heat range
⌀10mm	1mm
Thread diameter	Thread pitch
26.5mm (1.04")	14mm (9/16")
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)

SILMAR10A9S

Iridium-Platinum

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4.4/ 5

.035"26.5mm, ⌀10x1HR 10