BMW B58 G20/G29 & Toyota GR Supra A90 4.5-Inch Catless Downpipe (2019+)
BMW B58 G20/G29 & Toyota GR Supra A90 4.5-Inch Catless Downpipe (2019+)
BMW B58 G20/G29 & Toyota GR Supra A90 4.5-Inch Catless Downpipe (2019+)
Maximum Exhaust Flow. Enhanced Turbo Response. Unrestricted Performance.
Unlock the full performance potential of your B58-powered vehicle with the SimuFlow 4.5-Inch Catless Downpipe, designed for compatible BMW M340i, BMW Z4, and Toyota GR Supra A90 models equipped with the 3.0L B58 turbocharged inline-six engine.
Engineered to eliminate the restriction of the factory catalytic converter, this high-flow downpipe provides a more direct exhaust path, helping improve turbocharger efficiency, throttle response, and overall exhaust performance.
Whether you’re upgrading your B58 for track performance or building a high-horsepower competition setup, the SimuFlow 4.5-Inch Catless Downpipe is designed to support increased exhaust flow and demanding performance applications.
Key Features
- 4.5-Inch High-Flow Design: Large-diameter inlet engineered to reduce exhaust restriction and improve exhaust gas evacuation.
- Catless Configuration: Eliminates the factory catalytic converter for maximum exhaust flow.
- Enhanced Turbo Response: Reduced exhaust backpressure can support faster turbo spool and sharper throttle response.
- 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.
- B58 Platform Compatibility: Designed for compatible BMW G-Series and Toyota GR Supra A90 applications.
Performance Benefits
Maximum Exhaust Flow
The catless design removes the factory catalytic converter restriction, allowing exhaust gases to exit the turbocharger more efficiently. This helps reduce backpressure and supports improved performance, particularly on modified or tuned engines.
Improved Turbocharger Efficiency
A less restrictive exhaust path can help the turbocharger operate more efficiently under increased boost pressure and demanding driving conditions.
Aggressive B58 Exhaust Note
Experience a deeper, more pronounced exhaust tone with enhanced turbocharger sound, bringing out the distinctive character of the B58 inline-six engine.
Vehicle Compatibility
- BMW M340i: G20 Chassis — 2020+
- BMW Z4 M40i: G29 Chassis — 2019+
- Toyota GR Supra 3.0: A90/A91 Platform — 2020+
- Engine: 3.0L B58 Turbocharged Inline-Six
- Configuration: 4.5-Inch Catless Downpipe
Note: Fitment may vary by production year, engine revision, drivetrain configuration, and emissions equipment. Confirm compatibility before purchasing.
Important Information
- For competition/off-road use only where legally permitted.
- This product removes the factory catalytic converter and is not legal for use on pollution-controlled vehicles on public roads in the United States.
- Professional installation is recommended.
- ECU calibration may be required depending on the vehicle’s configuration.
- Installation may trigger a check engine light.
- 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.