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

Expert's advice:

The Evolution Racewerks N55 200-cell catted downpipe reduces exhaust backpressure compared to the OEM downpipe, resulting in increased power and torque, improved throttle response, and faster turbo spool, while retaining a high-flow metallic catalytic converter. This makes it an ideal upgrade for performance-driven street cars.

Manufactured from high-quality stainless steel and fully TIG welded, this downpipe replaces the original unit and offers a precise OEM-style fitment for BMW F1x models equipped with the N55 engine. The mandrel-bent piping and smooth transitions help reduce exhaust turbulence, while the integrated flex section protects the turbocharger and exhaust system under load.

Please note that although this downpipe is equipped with a high-flow catalytic converter, compliance with road regulations may vary by country. ECU remapping is recommended after installation to fully optimise performance and to prevent potential check engine light warnings.

Mark Hendrikx - Automotive engineer at Mosselman