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      02-12-2012, 03:58 PM   #95
beta
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Drives: 2006 M Roadster
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I'd be curious to see why your friend came to that conclusion. The WRT dyno posted earlier showed a gain of 3.6% hp, so 5% might be optimistic. But still that's 10-15hp on a stock car.

What other ways can one increase that much hp on our cars? Besides headers... Full CSL treatment only got BMW to 360, that's only 10-20hp more than headers. Unless you go FI there's not many places to gain.
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Last edited by beta; 02-12-2012 at 10:31 PM..
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