HJS ECE Downpipe BMW M135i/335i 3.0L N55B30A Euro 5 90812035 (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 M135i/335i 3.0L N55B30A Euro 5 90812035 (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 76 mm / 80 mm
- 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 M135i F20/F21 N55, Euro 5 (2012–2015)
- BMW 335i F30/F31 N55, Euro 5 (2012–2015)
Before ordering, verify the engine and body version, model year and the exact vehicle coverage of the selected catalytic-converter approval.


