Akrapovic 2023+ Audi RS6 Avant (C8) Evolution Line Cat Back (Titanium) (Req Link Pipe Set)

The Exhaust the 2023+ Audi RS6 Avant C8 Was Built to Wear

The Akrapovic S-AU/T/2H Evolution Line Cat-Back is the pinnacle exhaust upgrade for the 2023+ Audi RS6 Avant C8. Constructed entirely from aerospace-grade titanium and topped with four carbon-fiber-sleeved tailpipes, the S-AU/T/2H adds 15 hp and 22 Nm of torque while cutting 14.3 kg of deadweight from the RS6's rear end. Akrapovic S-AU/T/2H retains full compatibility with the factory Audi exhaust valve system across Comfort, Dynamic, and Individual drive modes with no check engine lights or error codes. A required link pipe set (sold separately) connects the S-AU/T/2H to the factory catalyst section for a complete, race-grade installation. Every S-AU/T/2H system is TIG-welded and dyno-verified at Akrapovic's Slovenia facility.

Key Features

• Full Titanium Construction — Mufflers, resonators, tubing, and tailpipes fabricated from aerospace titanium alloy for maximum heat resistance and longevity.
• 15 hp Power Gain — Dyno-measured increase of 11.2 kW on the 4.0 TFSI V8 twin-turbo when paired with the required link pipe set.
• 22 Nm Torque Increase — Added twist across the full RPM band for stronger acceleration on the RS6 C8 quattro drivetrain.
• 14.3 kg Weight Reduction — S-AU/T/2H system weighs approximately 18.7 kg versus the OEM 33 kg cat-back, saving 14.3 kg.
• Four Carbon-Sleeved Titanium Tips — Quad 114 mm tips with titanium inner sleeves and carbon fiber outer rings for a signature motorsport look.
• Factory Valve Integration — Plug-and-play compatibility with OEM RS6 exhaust valve actuators preserves Comfort, Dynamic, and Individual sound control.
• No Check Engine Light — Fully ECU-detected and ECE-approved for road use with no error codes or tuning required.
• Hand-Crafted in Slovenia — TIG-welded with Akrapovic's in-house titanium foundry castings used in MotoGP and WorldSBK race programs.

Fitment

Specifications

What's Included

• Titanium cat-back muffler assembly
• Titanium resonator section
• 4 x 114 mm carbon-sleeved titanium exhaust tips
• Exhaust valve wiring adapters
• Mounting clamps and hardware
• Akrapovic installation manual

Frequently Asked Questions

Yes. The S-AU/T/2H cat-back requires either the Akrapovic non-cat link pipe (L-AU/SS/3) or the high-flow cat link pipe (L-AU/SS/3H), sold separately, for a complete installation on the 2023+ RS6 Avant C8.

The S-AU/T/2H is a direct bolt-on fit for 2023-2025 Audi RS6 Avant C8 Premium Plus and Prestige trim models equipped with the 4.0 TFSI V8 twin-turbo quattro engine.

No. The S-AU/T/2H is fully plug-and-play with the factory RS6 exhaust valve sensors and actuators. No error codes or ECU modifications are required.

The system integrates with the OEM RS6 exhaust valve system, preserving Comfort, Dynamic, and Individual mode sound adjustments exactly as designed by Audi.

When combined with the required link pipe set, the S-AU/T/2H adds 11.2 kW (approximately 15 hp) and 22 Nm of torque as measured on Akrapovic's in-house dyno.

The S-AU/T/2H system weighs approximately 18.7 kg versus the OEM 33 kg cat-back, cutting 14.3 kg of unsprung weight for improved handling and throttle response.

No. The optional Akrapovic Sound Kit is a separate remote valve controller that allows even louder exhaust operation beyond the factory valve settings. It is sold separately.

With the OEM valves open the S-AU/T/2H produces a deep, aggressive V8 soundscape suited to spirited driving. In Comfort mode with valves closed the exhaust remains refined and free of highway drone.

Yes. The S-AU/T/2H holds ECE type approval, making it legal for road use in applicable markets. Verify local emissions regulations for your specific state or country.

Every S-AU/T/2H system is hand-fabricated in Akrapovic's main production facility in Slovenia using the same TIG-welding techniques and titanium alloys as their MotoGP and WorldSBK race exhaust programs.

Installation Instructions

1. Install the required Akrapovic link pipe set (L-AU/SS/3 or L-AU/SS/3H) first before fitting the cat-back section.
2. Raise and safely support the vehicle on a lift or jack stands. Allow all exhaust components to cool fully.
3. Disconnect the factory exhaust valve actuator wiring connectors at the rear cat-back section.
4. Remove the OEM cat-back by loosening the mid-pipe clamp and sliding the rubber hangers off their brackets.
5. Dry-fit the S-AU/T/2H to the link pipe outlet and OEM hanger positions before tightening any connections.
6. Slide the muffler assembly onto the rubber hangers and mate it to the link pipe with the supplied clamp, leaving loose for alignment.
7. Position the four carbon-sleeved titanium tips symmetrically and verify clearance from the rear bumper and diffuser on all sides.
8. Reconnect the factory valve actuator connectors to the S-AU/T/2H valve assembly; connectors are keyed and will only seat in the correct orientation.
9. Torque all clamps to Akrapovic specification, then start the engine and inspect for exhaust leaks at all connection points.
10. Cycle through Audi drive select modes to confirm valve operation across Comfort, Dynamic, and Individual settings.

WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.