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DC X3M40i · 01-29-2016, 10:32 PM

when you start the car up initially both exhaust flaps will be open. after a minute or two you will hear the left exhaust flap close.
it will only open again i believe when you reeally open up the throttle

01-29-2016, 10:32 PM	#2
DC X3M40i Captain 663 Rep 767 Posts Drives: 2023 X3 M40i Join Date: Jul 2014 Location: Long Island ny iTrader: (0)	when you start the car up initially both exhaust flaps will be open. after a minute or two you will hear the left exhaust flap close. it will only open again i believe when you reeally open up the throttle
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