This cat-back exhaust system is constructed of 3 IN - 2-1/2 IN mandrel-bent brushed finished 304 stainless steel tubing for maximum strength and durability. This system features a high-flow stainless steel muffler, producing a mild sound. Muffler finish may vary. Finishing off this exhaust system are quad 4 IN diameter polished 304 stainless steel exhaust tips. The tips features a laser etched aFe POWER logo for a unique style. This system produces an aggressive sound unleashing all available horsepower and torque. Requires cutting factory exhaust. Utilizing factory style hangers this system mounts directly to factory mounting locations for a hassle-free installation. This system incorporates a factory style exhaust valve which use the factory exhaust valve motor (not included). The valve helps regulate, direct and control the flow of exhaust gases by opening, closing, or partially obstructing passageways depending on throttle position for maximum performance. A mitered merge collector is used to decrease turbulence and increase exhaust velocity resulting in increased horsepower, torque and improved throttle response. State-of-the-art computer-aided design technology is utilized for precise vehicle fitment. 100% TIG-Welded for race-proven strength and durability. MACH Force-Xp 3 to 2-1/2 IN 304 Stainless Steel Cat-Back Exhaust w/Polished Tip BMW M2 Competition (F87) 19-21 L6-3.0L (tt) S55 BMW M2 Competition (F87) 19-21 L6-3.0L (tt) S55 Fitment: 2019 BMW M2 Competition 2020 BMW M2 Competition 2021 BMW M2 Competition