Dinan engineered the F95 X5 M and F96 X6 M axleback with 83mm tubing — 3mm larger than OEM — to allow freer flow throughout the system before gases reach the muffler. The muffler uses a combination of absorption and reactive damping technologies to reduce low-RPM drone while stepping aside under hard acceleration, when the retained computer-controlled exhaust valves open fully and bypass the muffler for near straight-pipe flow. Stock valve actuators are reused, so M-Drive exhaust mode still adjusts the system exactly as from the factory. Civilized in traffic. Aggressive when demanded.

Features:

+ 83mm tubing — 3mm larger than OEM for freer system flow
+ Retains factory computer-controlled valves and M-Drive exhaust mode integration
+ Absorption and reactive damping muffler tech — reduced drone at low RPM
+ Black ceramic laser-engraved tips
+ BMW F95 X5 M / F96 X6 M fitment (S63)