The aFe MACHForce XP 3" 304 stainless steel axle-back exhaust for BMW 135i (E82/88) 2008–2013 (N54/N55) is a bolt-on system that uses mandrel-bent 3" tubing, a free-flowing muffler and a crossover pipe to improve exhaust flow and tone. The system is reported to produce roughly 11 hp and 10 lb-ft of torque, comes with dual 3.5" black tips, OE-style hangers and is engineered for a balanced, less-drone sound.
aFe MACH Force XP 08-13 BMW 135i L6-2.0L N54/N55 3in. 304 SS Axle-Back Exhaust w/Black Tips