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      02-07-2013, 04:37 PM   #66
momo3605
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Drives: 328i M Sport
Join Date: Aug 2012
Location: Norcal

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So I have a question, what part of the exhaust do the test pipes replace? Can you still run it with any full exhaust? Or can you run it with the stock exhaust without the ACM mod...the noise is too raspy