Thread: DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.
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      02-10-2014, 09:00 PM   #643
YYC335is
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Drives: 2011 BMW 335is Coupe
Join Date: Feb 2014
Location: Calgary, AB

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Just did this on my IS. Love the extra growl from the exhaust. We'll see if the dealership flags any codes when I take it in for my first service.
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