Thread: DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.
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      04-08-2011, 04:20 PM   #430
bulldog_yyc
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Originally Posted by AWe90 View Post
just read 20 painful pages, but not so conclusive ;-)

Are there any long term damages that can occur to cats, ecu, or anything else as a result of doing this mod?
no
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