Any hp gains with 3.5in exhaust???
26 Mar 2006Im getting a full stainless steel exhaust done for my new calais, i was thinking of maybe goin to 3.5in. Has anybody ran a 3.5in exhaust and found significant horsepower gains?
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Im getting a full stainless steel exhaust done for my new calais, i was thinking of maybe goin to 3.5in. Has anybody ran a 3.5in exhaust and found significant horsepower gains?
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