dumb question. but lets say i do exhaust/headers plugs t-stat and whatever i have no kr how would i know if i can safely drop to the 3.4 vs the 3.5 without buying both and scanning them both?
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dumb question. but lets say i do exhaust/headers plugs t-stat and whatever i have no kr how would i know if i can safely drop to the 3.4 vs the 3.5 without buying both and scanning them both?
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