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      06-20-2008, 06:49 PM   #8
Original Bavarian Heritage
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Drives: 2008 E92 M3 DCT
Join Date: Jun 2008
Location: San Francisco

Posts: 354
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all the muffler only exhaust require the hack - only the cat back systems - expensive - are bolt on. Just looked under my car and the the point where you could install a bolt on is in the middle of the car...hope that helps!
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