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      11-05-2012, 06:32 AM   #14
dav_e92
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Drives: 2011 e92 335i BSM
Join Date: Sep 2012
Location: Toronto, Canada

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So I found the culprit of this noise. Just for the record if anybody experiences this noise also, it was the exhaust flap opening and closing. I did the golf tee mod and the noise was gone. Although I still doubt that this noise is normal as I haven't heard it in other 335i's that I've driven. Weird thing is though, my dealer swapped out the muffler and the noise did not go away. Anyhow, I love how my exhaust sounds with the golf tee mod now, especially those farts and burbles . Just a little bit of drone at low RPMs that I can live with.