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This is probably covered in the eight pages of this thread but I'll ask anyway. Is the stock exhaust a flap/valve exhaust? If not how does it achieve its changes in sound in the different drive modes? Also how does an MPE factor into all of this being a flap style exhaust? If one has an MPE what would be the loudest configuration Sport+ and Track Mode (exhaust)? Or would it be this "hidden" mode i.e. Comfort + MDM (Traction) plus Track Mode (Exhaust)? All this configuring has me confused and doesn't exactly line up with the M2's reputation of being a more analog back to basics machine.
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