2.5 to 3' cat
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Join Date: Sep 2005
Location: bay area
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2.5 to 3' cat
i have a full exhaust on my car with 3' from headers back into a 2.5 cat that seams to be aftermarket its very little, will changing it to a 3' high flow really make that much difference. i ask this because there like 300$ at my shot installed, and mine is fine right now but its 2.5.