Fabspeed Sport Catalytic Converter Downpipe BMW M340i G20 2019+


This downpipe feature German made HJS 200 cell EURO 6 compliant trimetallic catalytic converters. We use 4 in piping from the engine side to the cat, and 3 in tubing from the cat to the rest of the exhaust. Our larger catalytic converters are better because they allow for more exhaust flow and the increased catalysts surface area allows for better exhaust gas filtering which means emissions compliance that will NOT trigger a check engine light. Our Sport Cat Downpipe are a direct bolt-on replacement for the factory M340i catalytic converter.

When we looked at the factory 12" long 700 cell ceramic core cats we immediately found an opportunity for improvement. The OEM Cats restrict exhaust CFM flow, limit sound and worst of all, rob performance. Replacing the OEM cats for a set of Fabspeed Sport Catalytic converter will net you improved performance with absolutely zero fear of a check engine light.


  • The largest catalytic converter that will fit in the factory location
  • This German HJS EURO 6 homologated tri-metallic catalytic converter will support 1200HP+
  • MORE power than any other catalytic converter in the WORLD Guaranteed!!!
  • Significant performance gains across the RPM band
  • Even more power can be unleashed with a ECU tune. Please inquire.
  • Optimized for maximum performance with NO catalyst generated check engine light, guaranteed
  • Superior quality German and USA components built in house by hand
  • Constructed from CNC mandrel-bent T304L stainless steel
  • Simple bolt-on installation, no cutting or welding require
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty
  • BWM M340i G20 2019-Present

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