Unlock significant performance gains with the Evolution Racewerks Sports Series High Flow Catted Downpipes designed specifically for the BMW S55 twin-turbo engine. Engineered to reduce exhaust restriction and enhance turbo efficiency, these downpipes deliver faster spool, improved throttle response, and a stronger horsepower and torque curve across the entire RPM range.

Each downpipe features a high-flow 200-cell metallic catalytic converter, offering superior durability, higher temperature tolerance, and better airflow compared to the restrictive factory ceramic catalyst. With fewer cells per square inch and larger passageways, exhaust gases flow more freely—resulting in reduced turbo lag, improved boost response, and noticeable power gains.

Constructed in the USA from premium 304 stainless steel, the downpipes feature smooth 3" mandrel-bent tubing, precision CNC-machined turbo V-band flanges, stainless O2 sensor bungs, and laser-cut brackets. All units are fully TIG-welded in-house and designed to bolt directly to the factory or aftermarket exhaust without modifications. Factory slip-fit connections, O2 sensor locations, and the OEM donut gasket interface are retained for seamless installation.

For enhanced heat management, an optional high-temperature black ceramic thermal coating is available. This coating reduces under-hood temperatures, increases exhaust flow velocity by retaining heat energy within the pipe, and provides additional corrosion resistance.

Key Features:
• Made in the USA; built in-house
• High-flow 200-cell metallic catalytic converter
• Higher peak horsepower and stronger torque curve
• Faster turbo spool and improved throttle response
• Mandrel-bent 3" stainless steel piping
• 100% TIG-welded 304 stainless steel construction
• Precision CNC-machined 3.5" turbocharger V-band flange
• Retains factory O2 sensor locations and donut gasket
• Works with factory or aftermarket exhaust systems
• Mirror-polish or brushed finish
• Optional black ceramic thermal coating (2000°F resistant)
• Track-tested durability
• Includes hardware for complete installation
• Limited Lifetime Warranty

These downpipes replace the factory restrictive catalytic assemblies, allowing the S55 engine to breathe freely and deliver its full performance potential. Designed for enthusiasts seeking reliable, repeatable gains on both street and track cars.

Fitment 

Compatible Vehicles:
• 2015 BMW M3 (S55 engine)
• 2016 BMW M3 (S55 engine)
• 2017 BMW M3 (S55 engine)
• 2018 BMW M3 (S55 engine)
• 2019 BMW M3 (S55 engine)
• 2020 BMW M3 (S55 engine)
• 2015 BMW M4 (S55 engine)
• 2016 BMW M4 (S55 engine)
• 2017 BMW M4 (S55 engine)
• 2018 BMW M4 (S55 engine)
• 2019 BMW M4 (S55 engine)
• 2020 BMW M4 (S55 engine)
• 2020 BMW M2 Competition (S55 engine)
• 2021 BMW M2 Competition (S55 engine)
• 2022 BMW M2 Competition (S55 engine)

Note: This product is for off-road competition use only and is not legal for use on public roads or pollution-controlled vehicles. Not available for sale or installation in California.