aFe Power introduces the Elite Twisted Steel down-pipes with cats for the 2015 BMW M3/M4 (F80/82) 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, 48-state legal catalytic converters and includes all components for a hassle-free installation. 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 mounting locations for all O2 sensors. All necessary hardware is included for a hassle-free installation.
- In testing this system resulted in gains up to +21 horsepower and +23 lbs. x ft. of torque
- Includes 200 CPSI, 48-state legal catalytic converters to prevent check engine lights
- Constructed of 3" mandrel-bent, 304 stainless steel tubing
- Retains Factory O2 Sensor Locations
- BMW M3/M4 (F80/82)
- This system is not currently CARB exempt and is not available for sale in California or for use on any vehicle registered with the California Department of Motor Vehicle.