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first350 · 02-18-2013, 09:58 PM

I have a 2012 N55 and live in a quite neighborhood and leave for work around 6am...needless to say I want to keep the car quite when I'm at idle and cruising, but would really love for something louder at WOT.

Does anyone make an exhaust that uses the flapper valve mechanism/vacuum control?? I was hoping the BMW performance exhaust would do that, but from the pics I've seen they also get rid of the flapper valve.

Thanks!

02-18-2013, 09:58 PM	#1
first350 Private 8 Rep 92 Posts Drives: 2016 F80 M3 Join Date: Feb 2013 Location: Seattle iTrader: (1)	N55 non-oem exhaust w/ flapper valve used? I have a 2012 N55 and live in a quite neighborhood and leave for work around 6am...needless to say I want to keep the car quite when I'm at idle and cruising, but would really love for something louder at WOT. Does anyone make an exhaust that uses the flapper valve mechanism/vacuum control?? I was hoping the BMW performance exhaust would do that, but from the pics I've seen they also get rid of the flapper valve. Thanks!
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