BMW M3 and BMW M4 Forum - View Single Post - Any reason to not just leave your exhaust valves open all the time?

doug_999 · 01-25-2018, 06:45 PM

Well if it makes the car sound like it does when it starts, then I know one reason. Not pretty!

01-25-2018, 06:45 PM	#5
doug_999 Brigadier General 2542 Rep 3,968 Posts Drives: 2011 1M/2021 992/2023 X3 Join Date: Mar 2008 Location: Chicago, IL iTrader: (0)	Well if it makes the car sound like it does when it starts, then I know one reason. Not pretty! __________________ 2011 1M, Black loaded sans sat radio 2021 911 C4S Gentian Blue, manual 2023 X3 M40i - loaded sans Park Assist
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