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Twisted Steel Down-Pipe; Street Series

BMW M3/M4 (F80/82/83) 15-19 L6-3.0L (tt) S55
Part Number: 48-36312-1

MSRP: $2,245.40


  • Includes 200 CPSI catalytic converters
  • Constructed of 3" mandrel-bent, 304 stainless steel tubing
  • Retains Factory O2 Sensor Locations
  • 100% TIG-Welded
  • Thick flanges to ensure a leak-free seal
  • Includes high quality, O.E. style, V-band turbo flanges
  • In testing this system resulted in gains up to +21 horsepower and +23 lbs. x ft. of torque (Tested on a 2015 BMW M4 (F82) L6-3.0L (tt) S55)
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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.

Hassle-Free Installation:
All necessary hardware is included for a hassle-free installation.

Note: Vehicle may require tuning or programmer to eliminate a check engine light.

Emissions Disclaimer:
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.


Vehicle Applications

Year Make Model SubModel Engine Fuel
2015-2018BMW M3 (F80) L6 3.0L Gas
2015-2018BMW M4 F82/83 (S55) L6 3.0L Gas
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