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Old 06-05-2011, 03:55 PM
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Default Spark pulgs

What is the stock gap on the spark pugs for and ls4? And what would be a possibly better gap for preformance? Also any recommendations on brand?

Thanks guys
-Imppy-
Old 06-06-2011, 07:33 AM
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stock gap is .040...

if you have a tune done to the car, you should run one heat range cooler plug, and gap to .035...

ngk tr6ix iridiums... (these are one heat range cooler than stock)
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Old 06-06-2011, 04:15 PM
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I have Autolite Iridiums in mine and they run great, they're cheaper and you get a rebate from the Zone.
Old 06-06-2011, 11:01 PM
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Sweet, thanks guys.
Old 06-10-2011, 11:41 AM
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Ac Delco Ir




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