Description

The TNEER Catless Downpipe is the dedicated catalyst-replacement section for the BMW 840i Gran Coupe (G16) from 2019 onward. It is sold as a standalone downpipe and should not be confused with the separate TNEER valvetronic exhaust-system listing.

Removing the factory catalyst reduces exhaust restriction and is generally selected for tuned or competition-focused builds. ECU calibration requirements, warning-light behaviour and compatibility with the vehicle’s remaining exhaust hardware must be confirmed before purchase; no no-CEL or power-gain guarantee is implied.

Important: Catless exhaust hardware may not comply with road-use or emissions regulations. It is intended for off-road or competition use where permitted. Professional installation is recommended.

Fitment: BMW 840i Gran Coupe (G16), 2019 onward, B58. Please confirm build date and OPF/GPF specification before ordering.

*Image shows the wider TNEER 840i application system and may not depict the isolated downpipe supplied.