Genuine BMW G80 G82 M3 M4 M Performance Exhaust System and Diffuser 18305A23283. It has been removed from my Riviera Blue G80 M3 (photo'd).Excellent condition only 2k miles on the exhaust. Comes with OEM M Performance carbon diffuser. Love the sound of this exhaust and it feels like you have a work of art behind you when driving as it is so different to the norm. Reason for removal - I have M3CS coming and whilst I'd love to fit this to it BMW say it is not supported on the M3CS.