Evolution Racewerks Catless Downpipe, BMW B58

Expert's advice:

The Evolution Racewerks B58 catless downpipe significantly reduces exhaust backpressure directly at the turbo outlet, resulting in increased power and torque, faster turbo spool, and improved throttle response across the entire rev range. The large-diameter outlet and mandrel-bent piping provide a smooth and unrestricted exhaust gas flow, reducing turbulence compared to the OEM downpipe.

Manufactured from high-quality stainless steel and fully TIG welded, this downpipe replaces the original unit with a precise OEM-style fitment. The integrated flex section reduces stress on the turbocharger and exhaust system, contributing to long-term reliability under high load.

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

Mark Hendrikx - Automotive engineer at Mosselman