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How to make OEM exhaust louder
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07-26-2010, 09:31 AM
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RatchetM3
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Drives: 2011 E92 M3
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it looks like there's a lot of work to be done to make the oem exhaust louder. Here's the original thread
http://www.m3post.com/forums/showthr...em+exhaust+mod
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