Thread: M3 GTS dyno?
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      12-02-2012, 09:22 PM   #8
Munit
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Drives: m3
Join Date: Oct 2012
Location: CA

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Considering normal m3's with a catless/HFC exhaust and an air filter make 375whp, I do not think a 4.4 L bored out factor motor is making the same power even with its cat's in place.