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      11-07-2012, 03:55 PM   #2
Brigadier General
cstavaru's Avatar

Drives: 2009 335i M Sport Sedan 6MT
Join Date: Aug 2008
Location: Bucharest, Romania

iTrader: (0)

I have that problem, only at low RPMs when going WOT. But really it only seems to be present on Cobb, and I had never heard such noise with GIAC. However Cobb does have more torque at lower RPMs. Not sure what it is, the car drives fine otherwise and I have no lash/play in the diff or halfshafts. I read somewhere that the diff bushings may be soft. Could also be the exhaust.

PS: Why would you not speak the name of that forum member ?