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      12-07-2012, 11:35 AM   #432
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Andrew@ActiveAutowerke's Avatar

Drives: 435I - 2017 F80 M3 On its way
Join Date: Dec 2011
Location: Miami Fl

iTrader: (5)

Originally Posted by minyime View Post
After few more trials, finally concluded that the drone is caused by (harmonic) vibration. Looks like stock BMW muffler has a bolt-on damper. (#18303413587). Need tp find something similar that can be bolted on a "magic" spot in the exhaust somewhere (since I can't weld!). Those 2 rubber mounts may not be sufficient to handle the driving vibration since I have no drone when I load at P or N.
As soon as we get a car in the shop I will look into this issue.