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      08-07-2013, 01:30 PM   #10
CSanto
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Drives: 2015 BSM/SO M3
Join Date: Feb 2009
Location: New York

iTrader: (2)

Mild Exhaust+Stock Xpipe = Some Sound Increase, but no Power increase
Mild Exhaust+Test pipes (Or primary delete Xpipe) = Some sound Increase, Some Power Increase
Mild Exhaust+Sport Xpipe(HFC) = A Tad more Sound Increase, Some Power Increase

Mild Exhaust+Catless Xpipe = Most Sound increase for that Exhaust, Most Power Increase

Replace Mild exhaust with the Axle back of your choosing to get desired sound level.