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      04-19-2013, 11:40 PM   #5
ybbiz34
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Drives: 2023 330i M Sport
Join Date: Jul 2007
Location: USA

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My guess would be that, with respect to horsepower, you would see gains of roughly 5-10 horsepower. I think that the higher end of the estimate would only be attainable if the exhaust was installed in conjunction with something such as the M PPK.
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