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Racing Dynamics Race Downpipe BMW M340i | 440i | 540i B58 G20 2019+

Racing Dynamics Race Downpipe BMW M340i | 440i | 540i B58 G20 2019+

Regular price $445.00 USD
Regular price Sale price $445.00 USD
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Race Downpipe for BMW M340I, XI/440i/540i/740i/840i 2019 on with B58 3.0 L I6 turbo engine.Eliminates the largest restriction in your exhaust. 4 1/2" input flange with 4" mandrel bent downpipe manufactured out of 304 stainless steel, TIG welded with brushed finish. For left hand drive models only!


  • Straight-through design allows for maximum power and sound.
  • Straight-through tubing section replaces the heavy and restrictive OEM catalytic converters for maximum power and sound
  • Includes flex joint to reduce vibration from the engine and allows alignment during installation
  • Improves horsepower and torque significantly. Approximately 25 HP with a tune.
  • Direct bolt-on replacement for OEM primary catalytic converters
  • Less thermal load on the turbocharger
  • Reduces turbo lag
  • BMW 340i/ix B58 G20 2019+
  • BMW 440i B58 G20 2019+
  • BMW X440i B58 G20 2019+
  • BMW 540i/ix B58 motor, G30 2019+
  • BMW 840i/ix B58 motor, 2019+
  • Toyota A90 Supra B58 motor 2019+
  • These parts are intended for off road or track use only!


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