A stock BMW F87 M2 competition already has a nice tone on wide open throttle but if you want it to sound more aggressive than check out the aFe Power Mach Force XP catback exhaust system with carbon fiber exhaust 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. Making an aggressive sound & adding horsepower to your F87 M2. The XP catback uses 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.