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E90Fleet · 12-26-2011, 07:54 AM

Its actually there to make the exhaust sound less "boomy" at low RPM
It will open at higher RPM.

Its there to make the car quieter`at low RPM

12-26-2011, 07:54 AM	#3
E90Fleet Lieutenant General 1312 Rep 10,185 Posts Drives: BMW Join Date: Apr 2005 Location: South Africa iTrader: (0)	Its actually there to make the exhaust sound less "boomy" at low RPM It will open at higher RPM. Its there to make the car quieter`at low RPM __________________ BMW if you are reading, I need a job, Please.
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