Akrapovic 13-17 Audi S6 Avant/Limousine (C7) Evolution Line Cat Back (Titanium) w/ Carbon Tips

The Definitive Exhaust Upgrade for Audi S6 and S7 C7 — Akrapovic S-AU/TI/6H Evolution Line

The Akrapovic S-AU/TI/6H Evolution Line Cat Back (Titanium) with Carbon Tips is engineered for the 2013 to 2017 Audi S6 Avant and Limousine (C7) and the 2013 to 2017 Audi S7 Sportback (C7) with the 4.0L V8 TFSI biturbo engine. Hand-built in Akrapovic's Slovenia facility from aerospace-grade titanium, the S-AU/TI/6H delivers dyno-proven gains of 12 kW (16 HP) at 5,150 rpm and 19 Nm (14 lb/ft) at 2,000 rpm while removing 13.8 kg (30.4 lbs) from the factory 24.1 kg catback system. At just 10.3 kg (22.7 lbs), the S-AU/TI/6H is one of the lightest full titanium catback systems available for the C7 S6 and S7 platform. The four carbon fiber oval tailpipes transform the subtle factory exhaust exit into a visually assertive, sport-oriented rear presentation while the tuned Akrapovic muffler assembly produces an aggressive 83 dB/A exhaust note that the factory system cannot approach.

Key Features

• Full Titanium Three-Muffler Design - The S-AU/TI/6H uses three discrete titanium muffler housings to replace the factory muffler set, with individual units providing precise acoustic tuning for each exhaust path in the C7 S6/S7's complex four-pipe layout.
• Carbon Fiber Quad Oval Tips - Four carbon fiber oval tailpipes deliver a visually striking, motorsport-derived rear appearance that transforms the stock exhaust exit and contrasts with the S6 and S7's clean body lines.
• Dyno-Proven Power Gains - Akrapovic's own testing confirms +12 kW (16 HP) at 5,150 rpm and +19 Nm (14 lb/ft) at 2,000 rpm on a stock S6 or S7 C7 with the 4.0L V8 TFSI and no supporting modifications required.
• 30-Pound Weight Reduction - At 10.3 kg (22.7 lbs) versus the factory 24.1 kg (53.1 lbs) system, the S-AU/TI/6H removes 13.8 kg (30.4 lbs) from the rear of the vehicle for measurably improved weight distribution and handling balance.
• 83 dB/A Aggressive Sound Level - The Akrapovic-tuned muffler chambers produce an 83 dB/A exhaust note on the S6 and S7, delivering the deep, resonant V8 tone that the factory dual-mode exhaust manages but ultimately restrains.
• Direct Bolt-On Fitment - Uses all OEM mounting points and factory hanger locations with supplied hardware. No cutting, welding, or chassis modification required for C7 S6 Avant, Limousine, or S7 Sportback body styles.
• Retains Factory Catalytic Converters - The S-AU/TI/6H is a catback system that retains all OEM catalytic converters and oxygen sensors for emissions compliance and zero CEL conditions.
• Lifetime Warranty - Backed by Akrapovic's lifetime warranty against manufacturing defects.

Fitment

Specifications

What's Included

• Titanium front left muffler assembly
• Titanium front right muffler assembly
• Titanium rear muffler assembly
• 4x Carbon fiber oval tailpipes
• Stainless steel clamps, bolts, and mounting hardware
• Akrapovic installation instructions

Frequently Asked Questions

Yes. The S-AU/TI/6H is validated for the 2013 to 2017 Audi S6 Avant and Limousine (C7) and the 2013 to 2017 Audi S7 Sportback (C7), all with the 4.0L V8 TFSI biturbo engine. Both Premium Plus and Prestige trims are covered.

Akrapovic's dyno testing confirms a gain of 12 kW (16 HP) at 5,150 rpm and 19 Nm (14 lb/ft) at 2,000 rpm on a stock S6 or S7 C7 with the 4.0L V8 TFSI and no other modifications required.

No. The S-AU/TI/6H is a direct bolt-on catback system that retains all factory catalytic converters and oxygen sensors. The Audi S6 and S7 C7 factory ECU does not require modification or coding for this installation.

No. The S-AU/TI/6H retains all OEM oxygen sensors and catalytic converters in their factory positions. No fault codes or check engine lights are generated on a stock S6 or S7 C7 with this catback system installed.

The S-AU/TI/6H weighs 10.3 kg (22.7 lbs) versus the factory system's 24.1 kg (53.1 lbs), removing 13.8 kg (30.4 lbs) from the rear of the vehicle for improved weight distribution and sharper handling dynamics.

The S-AU/TI/6H produces an 83 dB/A exhaust note on the C7 S6 and S7, delivering a deep, resonant V8 tone that is noticeably more aggressive and layered than the factory system across the full rev range from idle to redline.

The C7 S6 and S7 use a passive sound actuator system rather than active electronic valves. The S-AU/TI/6H integrates with the factory mounting and hanger system. The factory valve bypass system can be retained or removed depending on the installer's preference and local requirements.

The S-AU/TI/6H retains the factory catalytic converters and is designed for street use. It is not CARB certified. California residents should verify CARB compliance before purchase. For all other US states, this is a street-compatible exhaust system. Always confirm local noise ordinances before use on public roads.

A professional installer or experienced enthusiast can complete the S-AU/TI/6H installation in approximately two to three hours. The three-muffler design requires careful positioning and clamp torque across all connection points for proper alignment of the four carbon fiber tips at the rear valance.

The S-AU/TI/6H is backed by Akrapovic's lifetime warranty against manufacturing defects, covering all components and workmanship for the life of the exhaust system.

Installation Instructions

1. Allow the vehicle to cool completely before beginning. The factory exhaust system on the S6 and S7 C7 retains significant heat after operation due to the complex multi-muffler layout.
2. Raise and secure the Audi S6 or S7 on a lift or appropriately rated jack stands with stable support at all four chassis jack points.
3. Loosen and remove all factory exhaust clamps at the catalytic converter outlets on both sides of the vehicle.
4. Disconnect all factory muffler hanger isolators along the full length of the catback routing path. The C7 S6 and S7 have multiple hanger points — support the weight of the muffler assembly before releasing the final hanger to prevent it from dropping.
5. Lower and remove the complete factory catback muffler assembly, including all three muffler units and connecting pipes. Inspect all rubber hanger isolators for wear, cracking, or deformation and replace any that are compromised before installing the Akrapovic system.
6. Install the Akrapovic titanium front left muffler onto the driver-side catalytic converter outlet. Attach the supplied clamp hand-tight and route the muffler into the factory hanger position.
7. Repeat for the Akrapovic titanium front right muffler on the passenger side, connecting to the passenger-side cat outlet and routing into the factory hanger position.
8. Connect the Akrapovic titanium rear muffler to both front muffler outlets and route the rear muffler into the factory rear hanger positions. Clip all rubber isolators at all rear hanger points.
9. Install the four carbon fiber oval tailpipes onto the rear muffler outlets. Tighten tip hardware to specification per the Akrapovic instruction sheet.
10. Confirm that all three muffler assemblies are fully supported on their hanger isolators, that all clamps are fully engaged, and that the four carbon tips are symmetrically aligned within the rear valance cutouts before applying final torque.
11. Torque all clamps to the specifications provided in the Akrapovic installation instructions included in the box.
12. Lower the vehicle and start the engine. Run through a full idle heat cycle for 10 to 15 minutes. After cooling, re-inspect all clamp joints and re-torque any connections that have loosened during the first thermal cycle.