Sports catalytic converter and heat shield for the latest M340i (2024–) and M440i (2025–) with mild-hybrid B58: less back pressure than the factory part, no smell and no warning lights, for everyday driving with a remap.
Why TC
- Made for mild-hybrid B58 – factory connections 148/80 mm
- Sports catalytic converter – more flow, no smell or smoke
- Heat shield, stainless steel
Technical data
- Material: stainless steel
- Sports catalytic converter + heat shield
- Engine connection: 148 mm, exhaust: 80 mm
- 1 connection for sensor
- Weight: 5 kg
- Intended for motorsport use; no type approval for road traffic.
Fits vehicles
- BMW 3 (G20/G21) M340i mild hybrid xDrive, 2024
- BMW 4 (G22) M440i mild hybrid xDrive, 2025
Delivery time: 6–8 working days. Please check fitment using the vehicle selector before ordering; if in doubt, write to us.

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