BMW 440i M Performance Sound Comfort/Sport Mode

M Performance Power and Sound Kit
Comfort: flaps closed
Sport: flaps open

[BillCipher]

wow just wow i thought the exhaust was allready in sport at the beginning, but than :O

[jupitermarx]

I have a 2018 440i coupe with M-performance sound and power kit

[sergiuilie]

I read that on the 2017 340i the m Performance exhaust was louder

[seangso]

Hey what cat back system are you running