aFe Power’s introduces the Twisted Steel down-pipes with cats for the 2015-2019 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. In testing, this system resulted gains up to +21 horsepower and +23 lbs. x ft. of torque. These down-pipes use 200 CPSI catalytic converters and includes all components for a hassle-free installation.
Dual High Flow Catalytic Converters:
Dual 200 CPSI catalytic converters are used for maximum flow.
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.
Note: Vehicle may require tuning or programmer to eliminate a check engine light.
This product is not currently CARB exempt and is not available for purchase in California or for use on any vehicle registered with the California Department of Motor Vehicles.
aFe down pipes are engineered and manufactured in our Corona, California manufacturing facility.