aFe Power Downpipe (w/ HFC)

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aFe Power Downpipe with High Flow Cat for BMW F2x/F3x/G1x [B58] & Toyota Supra (A90/J29) [B58]


  • Horsepower Increase: +30hp
  • Torque Increase: +31 ft.lbs

High Flow Catalytic Converter:
This downpipe utilizes a 400 CPSI (cell per square inch) catalytic converters for maximum flow.

3" Interlock Flex Pipes:
The downpipe utilizes heavy duty 3" flex tubes with internal interlock liners.

Factory Mounting Locations:
The down-pipe mount directly to factory mounting locations and includes hardware for a hassle-free installation.

Tapered Design:
A unique 4" into 3.5" stepped design is used to increase exhaust velocity and increase usable torque. This means more aggressive throttle response and increased passing power.

Factory Style Connections:
Machined, factory style flanges are used for a secure leak-free seal.

100% TIG-Welded by certified craftsmen for race proven strength and durability. TIG-Welding provides the strongest welds reducing stress cracks.

Brushed 304 SS Construction:
This downpipe are constructed of 4" into 3.5" mandrel-bent, brushed 304 stainless steel tubing for maximum performance, corrosion resistance and strength eliminating cracking.

O2 Sensor:
Includes an additional bung for either a wide-band O2 gauge or auxiliary instrumentation.


  • BMW 140i (F20/F21) [B58]
  • BMW 240i (F22/F23) [B58]
  • BMW 340i (F30/F31/F34) [B58]
  • BMW 440i (F32/F33/F36) [B58]
  • BMW 740i (G10/G11) [B58]
  • Toyota Supra (A90/J29) [B58]

Where To Buy?   (Find Closest Store)


aFe Power
Vehicle Fitment:
  • BMW 1-Series (F20/F21) [3.0L I6 Turbo B58]
  • BMW 2-Series (F22/F23) [3.0L I6 Turbo B58]
  • BMW 3-Series (F30/F31/F34) [3.0L I6 Turbo B58]
  • BMW 4-Series (F32/F33/F36) [3.0L I6 Turbo B58]
  • BMW 7-Series (G11/G12) [3.0L I6 Turbo B58]
  • Toyota Supra (A90/J29) [3.0L I6 Turbo B58]


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