Remus 046019 0500LR GPF-Back Exhaust System with Carbon Angle Tail Pipes 0046 83CTSR

The Remus 046019 0500LR / 047017 0000 / 0046 83CTSR is a complete GPF-Back exhaust system engineered for the Audi RS4 Avant Quattro B9 equipped with the Gasoline Particulate Filter (GPF). This system includes the sport muffler assembly, a non-resonated center section replacement tube, and the premium 0046 83CTSR Carbon Angle tail pipe set — a dual-exit Φ84mm angled style finished with a carbon fiber outer shell and a titanium-lined interior for an aggressive, race-inspired look.

Constructed using the absorption principle, the left and right sport mufflers feature integrated exhaust valves that are activated by the vehicle's OEM onboard electronics via the supplied actuators — no aftermarket valve controller required. The system uses a 70mm REMUS tube diameter (up from the OEM 65mm), reducing backpressure for improved exhaust flow and a noticeable increase in performance and torque. No rear skirt or body modifications are required for installation, and all mounting points match the factory locations.

Key Features:

• Complete GPF-Back system — includes sport mufflers (046019 0500LR), non-resonated center section (047017 0000), and Carbon Angle tail pipes (0046 83CTSR)
• Φ84mm Carbon Angle tail pipes with angled cut, carbon fiber exterior, and titanium-lined interior
• Integrated OEM-controlled exhaust valves — uses factory actuator and electronics, no modifications required
• Upgraded 70mm tube diameter vs. OEM 65mm for reduced backpressure and improved flow
• Non-resonated center section for a more aggressive, unrestricted exhaust note
• 100% stainless steel construction — shot-blasted surface finish
• Bolt-on installation at factory mounting points — no vehicle modifications required
• Includes ECE approval for road-legal use
• Handmade in Austria by REMUS Innovation GmbH
• 24-month manufacturer warranty

The REMUS GPF-Back system delivers a powerful, sport-tuned exhaust sound while retaining full compatibility with the RS4's factory GPF emissions system. It is a direct bolt-on upgrade that transforms the exhaust character without requiring any chassis or bodywork modifications.