Evolution Racewerks Catless Downpipe, BMW F1X 35i/40i N55

Expert's advice:

The Evolution Racewerks N55 catless downpipe for the BMW F1x 35i and 40i significantly reduces exhaust backpressure, resulting in increased power and torque, improved throttle response, and faster turbo spool. By removing the catalytic converter, exhaust gas flow is optimized and the thermal load on the turbocharger is reduced compared to the OEM downpipe.

Manufactured from high-quality stainless steel, this downpipe replaces the original unit and offers a precise OEM-style fitment for BMW F1x models equipped with the N55 engine.

Please note that catless downpipes are not road legal in most countries and may cause issues with local regulations. ECU remapping is mandatory after installation to optimize performance and to prevent potential check engine light warnings.

Mark Hendrikx - Automotive engineer at Mosselman