Thread: WTB aftermarket exhaust for 2.7
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Old 01-04-2020, 07:50 PM   #3
paulofto
2003 S, Arctic Silver, M6
 
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Join Date: Oct 2014
Location: Winnipeg, MB, Canada
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Rule of thumb is for every 5 dB increase in exhaust sound you can count on an increase of 1 bhp.
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