BMW F90 M5 / F91 F92 F93 M8 S63 Catless Downpipes (2017–2021)
BMW F90 M5 / F91 F92 F93 M8 S63 Catless Downpipes (2017–2021)
BMW F90 M5 / F91 F92 F93 M8 S63 Catless Downpipes (2017–2021)
Maximum Exhaust Flow. Enhanced Twin-Turbo Response. Unleash V8 Performance.
Unlock the performance potential of your BMW M vehicle with the SimuFlow Catless Downpipes, engineered for compatible BMW F90 M5 and F91/F92/F93 M8 models equipped with the powerful 4.4L S63 twin-turbocharged V8 engine.
Designed to eliminate the restrictions of the factory catalytic converters, these high-performance downpipes provide a more direct exhaust path, helping reduce backpressure, improve turbocharger efficiency, and deliver a louder, more aggressive exhaust note.
Whether you’re building a high-horsepower S63 setup or preparing your BMW for dedicated track use, the SimuFlow Catless Downpipes are designed to support increased exhaust flow and demanding performance applications.
Key Features
- High-Flow Catless Design: Eliminates the factory catalytic converters to reduce exhaust restriction and maximize exhaust flow.
- Twin-Turbo V8 Performance: Designed to support the increased exhaust demands of BMW’s 4.4L S63 twin-turbocharged engine.
- Enhanced Turbo Response: Reduced exhaust backpressure can support quicker turbo spool and sharper throttle response.
- Optimized Exhaust Efficiency: Promotes improved exhaust gas evacuation, particularly under increased boost pressure.
- Aggressive Exhaust Sound: Produces a louder, deeper exhaust note with enhanced turbocharger sound.
- Performance Tuning Potential: Designed to complement performance ECU calibrations and supporting engine modifications.
- S63 Platform Compatibility: Designed for compatible BMW F90 M5 and F91/F92/F93 M8 applications.
Performance Benefits
Maximum Exhaust Flow
The catless design removes the factory catalytic converter restrictions, allowing exhaust gases to exit the twin turbochargers more efficiently. This helps reduce backpressure and supports improved performance under demanding conditions.
Enhanced Twin-Turbo Efficiency
Reducing exhaust restriction can help the S63’s twin turbochargers operate more efficiently, particularly on modified vehicles running increased boost pressure.
Aggressive S63 V8 Exhaust Note
Experience a louder, deeper, and more pronounced exhaust tone with enhanced turbocharger sound, bringing out the distinctive character of BMW’s high-performance twin-turbocharged V8 engine.
Vehicle Compatibility
- BMW M5: F90 — 2018–2021
- BMW M8 Convertible: F91 — 2020–2021 (market-dependent)
- BMW M8 Coupe: F92 — 2020–2021
- BMW M8 Gran Coupe: F93 — 2020–2021
- Engine: 4.4L S63 Twin-Turbocharged V8
- Configuration: Catless Downpipes
Note: Fitment may vary by production year, chassis configuration, and emissions equipment. Confirm compatibility before purchasing.
Important Information
- For competition/off-road use only where legally permitted.
- These downpipes remove the factory catalytic converters and are not legal for use on pollution-controlled vehicles on public roads in the United States.
- Professional installation is recommended.
- Installation may trigger a check engine light.
- ECU calibration may be required depending on the vehicle’s configuration.
- Verify exact vehicle compatibility before purchasing.
Shipping & Delivery
Estimated Delivery Time: 15 Days
Your SimuFlow High-Flow Catted Downpipe is carefully prepared and shipped to ensure it arrives safely and in excellent condition.
Please allow approximately 15 days for delivery from the date your order is placed. Delivery times may vary slightly depending on your location and shipping conditions.