Quote:
Originally Posted by remmib
Quote:
Originally Posted by Jdubya
M performance exhaust fits with the stock M Sport diffuser. I just picked up my car with the M performance exhaust. Tips are nice but the exhaust is pretty loud and drones quite a bit under light throttle.
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Looking at your pic, it looks like you changed to the M550i diffuser.
http://g30.bimmerpost.com/forums/sho...6#post21402566
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No they said it was the stock one. Who knows!