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Old 07-31-2003, 01:40 AM   #4
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Join Date: Aug 2002
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Patr ick Willis
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Well since the WRX is a turbo, most of the exhausts for them will have a much larger pipe diameter, usually 3 inches, becuase big power is gained by eliminating backpressure from the turbo. While with a N/A application the optimal pipe diameter would be about 2.25-2.5. With a 3 in pipe you lose the backpressure which takes away your low end, although you will see big gains in the top end. Currently I am running an exhaust that I have only seen on turbo applications, 2 WRX's and a RS-T, so to answer your question I do believe that they are the same size.
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