Dinan Valved Axleback Exhaust - Black Tips - BMW G80 M3 / G82 M4

Developing a single axleback system that works across both the G80 M3 sedan and G82/G83 M4 coupe/convertible turned out to be a non-trivial engineering challenge — the two body styles produce different internal cabin drone characteristics. Dinan ran countless iterations before arriving at a system that sounds right externally and stays composed in the cabin on both platforms. The tubing is enlarged to 76mm (vs. 70mm OEM) throughout, and the factory exhaust valves are retained with their original operation unchanged: closed directs flow through the Dinan muffler's absorption and reactive damping hardware, exiting the inner two tips; open bypasses the muffler for near straight-pipe flow and maximum output at high load.

Features:

+ 76mm tubing throughout — vs. 70mm OEM — for freer system flow
+ Factory exhaust valves retained: closed routes through muffler, open is near straight-pipe
+ Validated on both G80 M3 sedan and G82/G83 M4 coupe/convertible for drone control
+ Black ceramic laser-engraved quad tips
+ BMW G80 M3 / G82 M4 / G83 M4 Convertible fitment (S58)