Audi 8V RS3 / 8S TT RS 2.5T Long Tube Catless Downpipe (2017+)

Maximum Exhaust Flow. Enhanced Turbo Response. Unleash 2.5 TFSI Performance.

Unlock the performance potential of your Audi RS vehicle with the SimuFlow Long Tube Catless Downpipe, engineered for compatible Audi 8V RS3 and 8S TT RS models equipped with the powerful 2.5L TFSI turbocharged five-cylinder engine.

Designed to eliminate the restrictions of the factory catalytic converter, this high-performance long tube downpipe provides a more direct exhaust pathway, helping reduce backpressure, improve turbocharger efficiency, and deliver a louder, more aggressive exhaust note.

Whether you’re building a high-horsepower 2.5 TFSI setup, upgrading your Audi with performance modifications, or preparing your vehicle for dedicated track use, the SimuFlow Long Tube Catless Downpipe is designed to support increased exhaust flow and demanding performance applications.

Key Features

• High-Flow Long Tube Design: Engineered to provide an optimized exhaust pathway that reduces restrictions and promotes efficient exhaust gas evacuation.
• Catless Configuration: Eliminates the factory catalytic converter to maximize exhaust flow and reduce backpressure.
• Turbocharged Performance: Designed to support the increased exhaust demands of Audi’s 2.5L TFSI turbocharged five-cylinder 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 Five-Cylinder Sound: Produces a louder, deeper exhaust note that highlights the distinctive character of Audi’s legendary turbocharged five-cylinder engine.
• Performance Tuning Potential: Designed to complement performance ECU calibrations, upgraded turbochargers, and supporting engine modifications.
• Audi RS Platform Compatibility: Designed for compatible Audi 8V RS3 and 8S TT RS applications.

Performance Benefits

Maximum Exhaust Flow

The long tube catless design removes the restrictions of the factory catalytic converter, allowing exhaust gases to exit the turbocharger more efficiently. This helps reduce backpressure and supports improved exhaust performance under demanding driving conditions.

Enhanced Turbocharger Efficiency

Reducing exhaust restriction can help the 2.5 TFSI turbocharger operate more efficiently, particularly on modified vehicles running increased boost pressure, upgraded turbochargers, or performance ECU calibrations.

Aggressive 2.5 TFSI Five-Cylinder Exhaust Note

Experience a louder, more pronounced exhaust tone, enhanced turbocharger sound, and the distinctive character of Audi’s high-performance turbocharged five-cylinder engine. The catless configuration brings out the unmistakable sound of the 2.5 TFSI platform.

Vehicle Compatibility

• Audi RS3: 8V — 2017–2020 (North American models)
• Audi TT RS: 8S — 2017–2022 (North American models)
• Engine: 2.5L TFSI Turbocharged Inline-Five
• Configuration: Long Tube Catless Downpipe
• Advertised Model Years: 2017+

Note: Fitment may vary by production year, engine code, drivetrain configuration, and factory emissions equipment. The 8V RS3 and 8S TT RS have different production timelines, and this product should not be assumed to fit newer 8Y RS3 models. Confirm exact vehicle compatibility before purchasing.

Important Information

• For competition/off-road use only where legally permitted.
• This downpipe removes the factory catalytic converter and is not legal for installation or use on pollution-controlled vehicles on public roads in the United States.
• Professional installation is strongly recommended.
• Installation may trigger a check engine light due to the removal of the factory catalytic converter.
• ECU calibration may be required depending on the vehicle’s configuration.
• Exhaust sound and performance characteristics may vary depending on existing modifications.
• Verify exact vehicle compatibility before purchasing.

Shipping & Delivery

Estimated Delivery Time: 15 Days

Your SimuFlow Long Tube Catless 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.