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      11-27-2012, 10:09 AM   #18
crabman
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Drives: M3
Join Date: Dec 2011
Location: WA

Posts: 669
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Make it +2, free revs just don't cut it for hearing what an exhaust sounds like. I've not heard many clips of the M-perf with various test pipes but this is commonly sited as a no-no due to rasp. Also would like to know how much drone the setup has, thanks.
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