Project Gamma BMW M3 | M4 (G80/G82/G83) Equal Length Catback Stainless Steel Exhaust System
The Project Gamma Equal Length Catback Exhaust system for the BMW G80 M3 and G82/G83 M4 models drastically improves the vehicle’s exhaust note and enhances performance by allowing unrestricted exhaust flow from the downpipes. 

This is a bolt-on system that is a direct replacement to the factory exhaust. The valved design allows for the use of the factory valves