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      11-02-2012, 12:33 AM   #19
Chriskm3
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Drives: M3
Join Date: Jul 2012
Location: Toronto

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I aswell went through this last two weeks. turner test pipes show 28 hp on dyno and 40hp at wheel with their catless tune. But catless xpipes, show around 14-18 hp gain at the wheels? whats the deal? Unless i'm getting my facts mixed up
additionally, full akrapovic exhaust with hfc xpipe only produces 22 wheel hp.
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