Which valve for louder exhaust?
Has anyone managed to figure out which valves in the exhaust can be permanently left open to make the exhaust sound better?
I did this on my M2, just unplugged one of the valves when it was open and it made a difference to the overall exhaust noise.
Is this possible on the Z4 M40i?
Thanks
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2020 BMW X5M Competition
2020 BMW Z4 M40i
2020 BMW 840i Cab
2003 BMW E46 M3 Coupe
1986 BMW 325i Coupe
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