Evolution Racewerks Catless Downpipes, BMW X5M F95 S63

Expert's advice:

The Evolution Racewerks catless downpipes for the BMW X5M F95 S63 engine reduce exhaust backpressure at the turbo outlet, resulting in increased power and torque, faster turbo spool and improved throttle response throughout the rev range. With mandrel-bent piping and precision V-band flanges, exhaust gas flows more freely than with the restrictive OEM components.

These downpipes are made from high-quality stainless steel and fully TIG welded in the USA, and they replace the original components with a precise fitment. The integration of an OEM-style flex section helps protect the turbochargers and exhaust system from stress during normal and spirited driving.

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