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Discussion Starter #1
just picked up maggie
09 6.1 car stock motor

i have heard to use a NGK 5107 that seams to be 2 steps colder than stock and gap at .030
i noticed they have a NGK 2315 that is 1 step colder

any suggestions

thanks
chris
 

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190 Posts
I went with the NGK 2315 on my car. I've had them in there for 15,000 miles with no problems.
 
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