Genuine BMW M3 M4 M2 M Performance Carbon Exhaust Tips. PLEASE NOTE: These Genuine BMW carbon exhaust tips only fit the models listed above that have either the MPE and MPPSK exhaust systems and DO NOT fit the stock exhaust system. The stock exhaust has a 70mm diameter exhaust outlet and the MPE and MPPSK exhaust have a 67mm outlet. If you are unsure what exhaust you have fitted, please check with your main dealer. 18302468411 was released in 2018 and supersedes part number. 18302358110 which was released in 2014. They are the same part which can be confirmed by RealOEM or by your local BMW dealer. Excellent Condition – Originally removed from a low mileage BMW F87 M2 to be replaced with an Akrapovic system. They have been in storage ever since. Please see images for more detail.