HJS ECE Downpipe BMW M140i M240i 340i 440i 540i 740i B58B30A E6 90812020 (ECE)
A downpipe is one of the most popular turbo-engine upgrades. A freer-flowing exhaust side can add a sportier sound while supporting throttle response and power potential. Read more in the Futurez downpipe guide.
This product includes model-specific ECE approval. The ECE version is intended for legal road use in the vehicle applications covered by the approval.
HJS ECE Downpipe BMW M140i M240i 340i 440i 540i 740i B58B30A E6 90812020 (ECE) offers vehicle-specific bolt-on fitment in place of the original downpipe. Its larger diameter and freer-flowing shape reduce back pressure after the turbocharger. This can sharpen turbo response and reduce exhaust-side thermal load, particularly on tuned engines.
- Pipe size mallikohtainen
- Vehicle-specific construction
- Freer-flowing design reduces exhaust back pressure
- Helps reduce thermal load on the turbocharger and exhaust side
- Manufactured from stainless steel
- TIG-welded construction
Examples of compatible vehicles
- BMW M140i F20/F21 B58 (2016–2019)
- BMW M240i F22/F23 B58 (2016–2021)
- BMW 340i F30/F31 B58 (2015–2019)
- BMW 440i F32/F33/F36 B58 (2016–2020)
- BMW 540i G30/G31 B58 (2017–2020)
- BMW 740i G11/G12 B58 (2015–2019)
Before ordering, verify the engine and body version, model year and the exact vehicle coverage of the selected catalytic-converter approval.


