I have an X6 40i with M Sport exhaust. It doesn't pop or bang, but is MUCH louder than my previous G30 540i, like MUCH louder. The car is brand new so I expect it will get louder too after a while like my G30 did.
So when you guys say the M Sport exhaust is quiet, are you referring to lack of pops/bangs compared to a X3M40i, or are you referring directly to the volume of sound under load?
I can't imagine what I'm hearing under load being described as 'quiet' under any circumstances, but I have never had a car with any kind of performance exhaust before either so I'm not sure what the expectations are.
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