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      01-10-2013, 08:28 PM   #6
SeanS54
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Drives: N54 LCI 335i M-Sport
Join Date: Jan 2011
Location: Bay Area, CA

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^^^ this is true...

I wouldn't even call it noise... it's hardly noticeable... no drone and no dramatic sound increase.. it sounds like a stock exhaust just a small tad louder... at least on my E90 w/ stock exhaust