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Discussion Starter #1
What spark plug do you run in your set-up? From what I understood, I should go with a step-colder copper plug at .032" gap. Is this true?

thanks, Donnie
6m-gte w/ H3 trim CT26
 

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Discussion Starter #3
I have Denso Iridiums; I guess I could drop the gap. But is there an advantage to using copper plugs (since they're cheap and easy to swap on our cars)?
 

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Any disadvantages to running a 1 step colder plug on a turbo'd 5m or 6m?
 
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