aFe MACHForce XP 3-2.5in SS Cat-Back Exhaust BMW M2 Comp (19-21) (49-36350-P)2019 2021 BMW M2 Competition MACHForce XP Cat Back Exhaust System by aFe Power Turn up the excitement of any 20192021 BMW M2 Competition with aFe Power's MACH Force Xp Cat Back Exhaust System. This system features a high flow 304 stainless steel tubing and muffler, producing a mild sound. A mitered merge collector is used to decrease turbulence and increase exhaust velocity, resulting in increased horsepower, torque, and improved throttle response.