DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.
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06-01-2009, 09:40 PM
enter macho title here...
Drives: X3 / 335cp / 135 vert-135vert2
Join Date: May 2009
If aftermarket cans don't void a warranty, dont burn up your cats and don't include the flap...
Why would this cause your dealer to give you problems?
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