What Spark Plugs

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Aug 13, 2008 | 06:05 PM

Bow94z

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From: Philly PA

What Spark Plugs

with my car nearing 50K miles, I want to look into sparkplugs.

Besides Ac Delco's plugs, What other choices have been good for a LS4?

I run NGK's in my LT1 with no issues, how are they on LSX based cars?

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Aug 13, 2008 | 06:28 PM

Mgpeagle

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From: Ain't tellin'

I run Autolite Iridiums in mine. The part number I run is XP5243. Some run XP104's too. 104's are 1 heat range colder and 5243's are 1.5 to 2 heat ranges colder. I have had no problems thus far. I get 2 more mpg too.

-Mike

Last edited by Mgpeagle; Aug 13, 2008 at 08:54 PM.