M4 Stainless Steel Full System Exhaust with Carbon Fiber Muffler – Yamaha R3 / MT-03

M4 has gone to great lengths to make sure their full system exhaust for the R3 is better than the competition.  They are confident this system will give you the most power possible from any aftermarket exhaust system available.

The M4 full system exhaust includes an M4 lightweight exhaust hanger bracket or you can still use the OEM passenger foot peg assembly.  The M4 full system with carbon fiber muffler produces 10% more horsepower than the stock system and weighs 11.5 lbs less.

The M4 full system exhaust comes with the removable Q8 quiet insert already installed.  There is also an extra quiet stage 2 (Q6) available for an additional $56.

All M4 full system exhausts come with 18mm wide band O2 sensor bungs and also include reducers to fit 12mm narrow band O2 sensors such as the Yamaha R3 OEM sensor.