DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.
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06-07-2009, 03:52 PM
Drives: 09 335I COUPE ON ORDER
Join Date: Apr 2009
Location: CHARLOTTE NC
bmw has an aftermarket mufflers , dealer install and it does not have the valve so the back pressure issue seems moot,aia will do the golf t.My dealership offered to get and install Corsa mufflers, no valve here either.
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