Description
Upgrade the exhaust performance of your BMW X5M or X6M with the Evolution Racewerks Competition Series Catless Secondary Downpipes. Engineered specifically for the S63M twin-turbo V8 engine, these premium secondary downpipes are designed to improve exhaust flow, increase horsepower and torque, sharpen throttle response, and reduce turbo spool time while maintaining compatibility with both factory and aftermarket exhaust systems.
Manufactured entirely in the USA using premium 304 stainless steel, these Competition Series downpipes feature mandrel-bent 3-inch tubing, CNC-machined flanges, precision TIG welds, and factory-style fitment for a true bolt-on installation. Because these secondary downpipes replace only the secondary catalytic converter section, they are located after the secondary oxygen sensors and do not trigger a Check Engine Light (CEL) on applicable vehicles.
Available with an optional high-temperature black ceramic thermal coating, these downpipes help reduce engine bay temperatures while improving exhaust gas velocity and corrosion resistance, making them an excellent choice for high-performance and track-oriented builds.
Features
- Designed specifically for the BMW S63M twin-turbo V8 engine.
- Fits factory and aftermarket exhaust systems.
- Replaces the factory secondary catalytic converters.
- Does not trigger a Check Engine Light (CEL).
- Improves horsepower throughout the power curve.
- Produces quicker and higher torque delivery.
- Faster turbo spool and improved throttle response.
- Mandrel-bent 3-inch stainless steel tubing for maximum exhaust flow.
- Constructed from premium 304 stainless steel.
- Precision TIG welded for superior strength and durability.
- CNC-machined billet 304 stainless steel turbocharger V-band flanges.
- CNC-machined stainless steel oxygen sensor bungs.
- Factory-positioned O2 sensor placement.
- Laser-cut stainless steel mounting brackets.
- Factory-style slip-fit exhaust connection.
- Compatible with factory or aftermarket primary downpipes.
- Compatible with factory or aftermarket cat-back exhaust systems.
- Available in brushed or mirror-polished finish.
- Optional black ceramic thermal coating rated for temperatures up to 2,000°F.
- Helps reduce engine bay temperatures when ceramic coated.
- Improves exhaust gas velocity and reduces backpressure.
- Increased corrosion resistance with ceramic coating.
- 100% bolt-on installation.
- Includes all required installation hardware.
- Track-tested durability.
- Manufactured in the USA.
- Limited Lifetime Warranty.
Construction
The Competition Series Catless Secondary Downpipes are built from 100% 304-grade stainless steel with smooth mandrel bends to maximize exhaust flow while minimizing turbulence and restriction. Every assembly is TIG welded by in-house fabricators for exceptional strength and longevity.
Each unit features precision CNC-machined billet stainless steel V-band flanges that replicate the factory 3.5-inch turbocharger connection for an accurate seal and factory-quality fit. Stainless steel oxygen sensor bungs and laser-cut brackets are welded into their factory locations, ensuring proper sensor positioning and straightforward installation.
Performance Benefits
The factory exhaust system uses secondary catalytic converters that create additional exhaust restriction. By replacing these restrictive components with free-flowing catless secondary downpipes, exhaust gases exit the engine more efficiently, reducing backpressure and improving overall engine performance.
Benefits include:
- Increased horsepower.
- Increased torque.
- Improved throttle response.
- Faster turbocharger spool.
- Improved exhaust flow.
- Reduced exhaust restriction.
- Better high-RPM performance.
OPF Compatibility
For European and Asian specification vehicles equipped with the Otto Particulate Filter (OPF) system, Evolution Racewerks offers OPF-compatible versions that retain full OPF functionality while delivering improved exhaust performance.
Ceramic Thermal Coating Option
Optional black ceramic thermal coating provides multiple performance advantages:
- Helps contain exhaust heat inside the piping.
- Reduces underhood temperatures.
- Protects surrounding engine components from heat soak.
- Maintains higher exhaust gas velocity.
- Reduces exhaust backpressure.
- Provides additional corrosion resistance.
- Rated to withstand temperatures up to 2,000°F.
Vehicle Fitment
BMW X5M (F95)
- 2019 BMW X5M (S63M Twin-Turbo V8)
- 2020 BMW X5M (S63M Twin-Turbo V8)
- 2021 BMW X5M (S63M Twin-Turbo V8)
- 2022 BMW X5M (S63M Twin-Turbo V8)
- 2023 BMW X5M (S63M Twin-Turbo V8)
BMW X6M (F96)
- 2020 BMW X6M (S63M Twin-Turbo V8)
- 2021 BMW X6M (S63M Twin-Turbo V8)
- 2022 BMW X6M (S63M Twin-Turbo V8)
- 2023 BMW X6M (S63M Twin-Turbo V8)
Fitment Notes
- Fits vehicles equipped with the S63M twin-turbo engine.
- Replaces only the factory secondary catalytic converters.
- Factory primary catalytic converters may be retained.
- Compatible with aftermarket primary downpipes.
- Compatible with factory exhaust systems.
- Compatible with aftermarket cat-back exhaust systems.
- Factory-style slip-fit connection.
- 100% bolt-on installation.
- Secondary O2 sensor remains in the factory location.
- Designed so replacement of the secondary catalytic converters does not trigger a Check Engine Light (CEL).
Important Legal Notice
- Intended for off-road competition use only.
- Not legal for use on pollution-controlled vehicles operated on public roads or highways.
- Not available for sale, installation, or use on licensed vehicles in the State of California.
- Vehicle compliance verification and waiver may be required where applicable.
