The MACH Force XP Race Pipe for the BMW E90, E92 and E93 M3 produced 27 horsepower and 50 lbs. x ft. of torque. This exhaust race pipe is constructed from TIG-welded, 2.5 in. mandrel bent, 304 stainless steel tubing. It uses dual, high flow, 300 cell catalytic converters for maximum flow providing an astonishing low end torque improvement. While developing this system, we ensured that this aFe Race Pipe not only increased performance but delivered a powerful and aggressive tone. Incorporated is an X-Pipe balance tube, which equalizes and evenly distributes exhaust pulses for increased performance across the power band. Dual resonators are also used to absorb high pitch sound decibels, minimizing exhaust drone. This race pipe can be used with the OE muffler or aFe cat-back exhaust systems. This race pipe requires no modifications and uses all factory hanger locations for a hassle free installation. This is a Race Only product used solely for competition. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use including recreational off-road use could be in violation of local, state and federal laws. All aFe exhaust systems are engineered and manufactured in our Corona, California manufacturing facility. MACH Force-Xp 2-1/2 IN 304 Stainless Steel Street Series X-Pipe w/ Cats BMW M3 (E90/92/93) 08-13 V8-4.0L BMW M3 (E90/92/93) 08-13 V8-4.0L