Thread: exhaust advice
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      04-05-2010, 12:11 PM   #4
RON1X
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Drives: 997 Turbo, B8.5 Audi Allroad
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2008 E92 M3  [4.50]
here is a good test done by grassroots motorsports. It doesn't necessarily go by "sound" but you can read a lot about competing exhaust systems. It does give info on the dB level of each though...
http://grassrootsmotorsports.com/art...ive-decisions/
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