2010 2011 BMW 5 Series Forum F10 - View Single Post

5fix · 02-13-2012, 10:30 PM

If you read the thread, someone posted a link to another thread that explains the function of the butterfly valve on the mufflers. Several people have posted about blocking the valve open, with the only result being a bit more exhaust note.

02-13-2012, 10:30 PM	#4
5fix Private First Class 61 Rep 102 Posts Drives: 2020 X5 40i; 2018 m550i Join Date: Jan 2011 Location: Illinois iTrader: (0)	If you read the thread, someone posted a link to another thread that explains the function of the butterfly valve on the mufflers. Several people have posted about blocking the valve open, with the only result being a bit more exhaust note.
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