1 or 2 step colder plugs?
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1 or 2 step colder plugs?
I have a 2006 cobalt ss/sc by the time I buy the plugs I will have devils progressive meth kit pacesetter header catless dp 60lb injectors 2.79in pulley front mount h/e and a flowmaster muffler. My question is do u think I need 1 step colder plugs or 2step colder plugs rite now I have stock plugs
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agentirons
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10-16-2015 02:11 AM