Racing Dynamics  |  SKU: #130 10 58 340

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



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!
  • This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.

    Purchasing this product requires you to sign our Vehicle Compliance Waiver here.


  • Model
    M3, 340i, 440i
IMG_9438_2_4b56a9fe-5b4b-4d37-ab14-e16149e0f5c7 - Revline Performance