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I've tried the NGK and Brisk and seem to favor the Brisk (both 1 step colder than stock). This is based on lower count of misfire in general (not just at WOT). I really don't "feel" any difference obviously but the car did make its peak power last year on Brisk.
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2017 Camaro ZL1 Coupe M6 (847whp Dynojet on 93)
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