aFe Power's introduces the "Race Only"Twisted Steel down-pipes for the 2015-2018 BMW M3/M4 (F80/F82/F83) with the L6-3.0L (tt) S55 engine. The down-pipes are 100% TIG-welded and constructed of mandrel-bent, 3", 304 stainless steel tubing with thick flanges to ensure a leak-free seal. This high performance race pipe delivers pure, race-inspired raw power and also produces an aggressive and exciting exhaust sound during hard throttle.
100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks.
Factory O2 Sensor Locations:
Factory mounting locations for all O2 sensors.
All necessary hardware is included for a hassle-free installation.
This system requires an aftermarket electronic module to work properly with the vehicle.
This is a Race Only product that is to be used solely for competition, it cannot be used on vehicles that are operated on public streets, roads or highways. 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. To complete the purchase of this item, aFe Power competition acknowledgement/liability release form must be filled out and submitted.
All aFe exhaust systems are engineered and manufactured in our Corona, California facility.