Audi B9 S4 / S5 3.0T (EA839) High-Flow Catted Downpipe (2018+)

Audi B9 S4 / S5 3.0T (EA839) High-Flow Catted Downpipe (2018+)

Improved Exhaust Flow. Enhanced Turbo Response. Unleashed Performance.

Unlock the performance potential of your Audi S4 or S5 with the SimuFlow High-Flow Catted Downpipe, engineered for the B9 platform equipped with the 3.0L EA839 turbocharged V6 engine.

Designed to reduce the restrictions of the factory downpipe while retaining a catalytic converter, this performance upgrade promotes improved exhaust flow, enhanced turbocharger efficiency, and a deeper, more aggressive exhaust note.

Whether you’re looking to improve your Audi’s driving dynamics or support additional performance modifications, the SimuFlow High-Flow Catted Downpipe delivers the ideal combination of exhaust efficiency, performance potential, and refined sound.

Key Features

• High-Flow Catted Design: Engineered to reduce exhaust restriction while retaining a catalytic converter.
• Improved Turbo Response: Reduced exhaust backpressure can support quicker turbo spool and sharper throttle response.
• Enhanced Exhaust Efficiency: Optimized exhaust flow helps improve turbocharger performance, particularly on modified or tuned vehicles.
• Aggressive Exhaust Sound: Produces a deeper, sportier exhaust note while maintaining a refined driving experience.
• Performance Tuning Potential: Designed to complement ECU tuning and supporting performance upgrades.
• Vehicle-Specific Fitment: Designed for compatible Audi B9 S4 and S5 models equipped with the 3.0T EA839 engine.

Performance Benefits

Improved Exhaust Flow

The high-flow catalytic converter design reduces exhaust restriction compared to the factory configuration, allowing exhaust gases to exit the turbocharger more efficiently and supporting improved engine performance.

Enhanced Turbocharger Efficiency

Reducing exhaust backpressure can help improve turbocharger efficiency and responsiveness, especially under increased boost pressure and demanding driving conditions.

Refined Performance Sound

Experience a deeper, more pronounced exhaust note that enhances the character of Audi’s turbocharged V6 without completely eliminating the catalytic converter.

Vehicle Compatibility

• Make: Audi
• Models: S4 / S5
• Platform: B9
• Model Years: 2018+ (compatible EA839 applications)
• Engine: 3.0L EA839 Turbocharged V6
• Configuration: High-Flow Catted Downpipe

Note: Fitment may vary by model year, chassis revision, and emissions configuration. Confirm compatibility before purchasing.

Important Information

• Professional installation is recommended.
• ECU tuning may be recommended depending on the vehicle’s configuration and supporting modifications.
• Installation may trigger a check engine light.
• A high-flow catalytic converter does not guarantee emissions compliance or street legality.
• Verify local emissions regulations and vehicle compatibility before purchasing or installing.

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.