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      01-04-2013, 03:19 AM   #6

Basheezy's Avatar
Drives: 2008 BMW 135i
Join Date: Jun 2010
Location: Bay Area, CA

Posts: 775
iTrader: (2)

The Performance Exhaust is a muffler and resonator(delete) I believe.

...On a sidenote, why do muffler deletes have a sort of whistle sound to them at WOT? ( I have a custom one, but have heard others like Berk and sounds the same). Is there a way to get rid of that whistle? (bigger diameter?eliminate y-pipe?)