Want to make your BMW F87 M2 competition sound more aggressive than check out the aFe Power Mach Force XP catback exhaust system with polished tips. This 3 inch to 2.5 inch exhaust system is constructed of brushed 304 stainless steel tubing and includes a high flow stainless steel muffler. Producing an aggressive sound and adding horsepower to your F87 M2. The XP catback incorporates the factory style exhaust valve into the system (motor not included) which helps regulate, direct & control the flow of exhaust gases by opening, closing or even partially obstructing passageways depending on throttle positioning. A mitered merge collector is used to decrease turbulence & increase exhaust velocity which results in more horsepower, torque and improved throttle response.