Valved Exhaust System for Audi S6 / S7 C8 2.9 TFSI V6 (2019-2025)
Configuration
Audi S6 / S7 C8 2.9 TFSI V6 Valved Exhaust System (2019-2025)
Valves
Operated by remote control, factory-paired.
Estimated at 0.50 m from the outlet, 45°, 2,000 rpm with a warm engine. Allow ± 2 dB depending on the engine and measuring point. A 3 dB difference is audible in a direct comparison; 10 dB sounds roughly twice as loud.
Configuration guide
Sound intensity with the valves open, on a scale of 0 to 10.
| Configuration | Intensity |
|---|---|
| Decat downpipe + Rog cat-back | 10/10 |
| 100-cell sports catalytic converter + Rog cat-back | 9/10 |
| 200-cell sports catalytic converter + Rog cat-back | 8/10 |
| Rog cat-back only, factory catalytic converter retained | 7/10 |
| Factory exhaust, for comparison | 3/10 |
AudiA6 / A7 / S6 / S7 / RS6 / RS7 C8
The Audi S6 and S7 C8 2.9 TFSI exhaust in detail.
On the petrol S6 and S7 C8, Audi placed the 2.9 TFSI’s two turbos inside the vee formed by the cylinder banks: the gas path shortens, the response becomes sharp, and this 2.9-litre V6 delivers 450 hp with 600 Nm available very early. This page covers the 2019 to 2025 model years; the diesel versions sold in Europe on the same generation are not included.
A twin-turbo V6 does not have the roundness of a V8, but it has a deep, mechanical grain, with a hint of roughness under acceleration. On the stock S6, it shrinks to a distant whisper drowned out by road noise as soon as speed rises. With the valves open, our valved cat-back gives it back a muffled, full tone at start-up, then a tauter note when you accelerate hard; with the valves closed, the S6 and S7 become long-distance touring cars again.
Two round tailpipes mark the rear, and the system is secured with clamps and gaskets, no welding, in about two hours. The factory valve control stays active if the car has it; otherwise, the Rog remote, whose box slips into the boot, takes over at the press of a button.
Further upstream, the option called “Manifold” actually replaces the pair of downpipes running down from the turbos with the catalytic converters. For a grand tourer that stays on the open road, the 200-cell version keeps emissions control intact; the 100-cell is accepted or not depending on the vehicle and your country’s rules, while the decat version is reserved for track use. Without an ECU remap, the V6 keeps its 450 hp, simply with more voice and a little less weight. Titanium takes around 40% off the weight of 304 stainless steel and dresses these grand tourers in brushed, gold or purple hues.
Audi S6 / S7 C8 2.9 TFSI V6 exhaust specifications.
| System type | Valved cat-back (valve exhaust), round tailpipes, built to your VIN |
|---|---|
| Vehicles and chassis code | Audi S6 saloon and Avant, S7 Sportback C8 2.9 TFSI petrol; TDI versions not covered |
| Engine | 2.9 TFSI, twin-turbo V6, turbos in the vee, 450 hp and 600 Nm |
| Years | 2019-2025 |
| Materials and finishes | 304 stainless steel or titanium; titanium in brushed, gold or purple |
| Valves | Factory valve control if the car has it, otherwise the Rog remote |
| Front section (option) | Downpipes with 200-cell or 100-cell catalytic converters, or decat |
| Fitting | Clamps and gaskets, no welding, about 2 hours on a lift |
| Manufacturing and delivery | Made to order, 20 working days, free delivery |
| Warranty | 3 years, parts and workmanship |
Questions about the Audi S6 / S7 C8 2.9 TFSI V6 exhaust.
My S6 C8 is a TDI: does this system suit it?
No. This system is designed for the petrol 2.9 TFSI of the S6 and S7 C8, with no extension to the diesel engines. Write to us with your TDI’s VIN: we will tell you honestly what exists, or not, for it.
What is published at Stage 2 for an S7 C8 2.9 TFSI?
The cat-back alone leaves the factory engine management in place and simply frees the V6’s voice. Once the downpipes are fitted and the map revised at an approved tuning centre, the page shows 530 hp and 830 Nm, against 450 hp and 600 Nm as standard.
Vehicle inspection for an S6 C8: does anything need removing?
Presented with the valves closed, it regains the hushed breath it had when it left the factory. Its gas treatment remains complete with the cat-back alone or the 200-cell downpipes. Beyond that, the 100-cell is judged according to the vehicle and your country’s rules, and downpipes without a catalytic converter belong only on a circuit.
On a long journey, does the equipped S7 C8 become noisy?
No, as long as the valves stay closed: the gases pass through the silencer, designed for cruising, and the cabin keeps its grand-touring calm. The valves only open on your command, for a back road or a quick merge.
Does the S6 Avant C8 2.9 TFSI take the same system?
Yes, with the 2.9 TFSI petrol engine: sold since 2020, notably in Japan, the S6 Avant takes the same Rog system as the S6 saloon and the S7. The European S6 Avant, with its TDI engine, is not covered. Your VIN confirms the engine before manufacturing.
Audi S6 / S7 C8 2.9 TFSI V6: Does a valved exhaust system drone?
No. With the valves closed, the gases flow through the whole rear silencer and the cabin stays calm at a steady speed. Our Rog exhausts are designed to avoid drone. Learn more: Why our systems stay calm on the motorway.
Audi S6 / S7 C8 2.9 TFSI V6: straight pipe or resonator?
On this model, two characters at the same price: the straight pipe for the raw sound of your engine, unfiltered, or the resonator for a rounder and slightly softer voice. Either way, the exhaust stays fully sporty. Learn more: Exhaust resonator: what does it do? Straight pipe or resonator, which sound to choose.
Rog expert guide
Audi S6 / S7 C8 V6: giving the biturbo a voice, the exhaust system guide
Whether S6 or S7 Sportback, the Audi C8 models built from 2019 to 2025 hide a 2.9-litre, 450 hp biturbo V6 beneath their elegance. Fast cars, effective in all circumstances, but whose factory exhaust does everything to keep the engine...
In detail
Rog Advisor
A question about this exhaust?
Fitment, sound, catalyst, valves, delivery: the answer comes straight away, with your configuration in context.
The Rog Advisor is an automated assistant trained on our product pages and answers. For an important decision, write to us: we confirm by e-mail.
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Rog presentation film: choosing your vehicle, Standard or Equal Length design, stainless steel or titanium, Z-Pipe, controlled valves, titanium and tip finishes, and support from choosing your configuration through to shipping.
THE Rog CRAFT
Our process.
From the first bend to the last check. The same care at every step.
-
Design
Designed for your vehicle.
Geometry matched to your model, carefully studied bends and precise mounting points. Everything starts with accurate design.
-
Manufacture
Crafted with precision.
Tube bending, part fitting and TIG welding: every joint receives the same care.
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Finishing
Material, elevated.
The finish reveals the character of the metal. Stainless steel or titanium, depending on the options available for your vehicle.
-
Assembly
Every part in its place.
Components are assembled and adjusted. On valved systems, the mechanism is fitted, set up and tested.
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Inspection
Check. Then approve.
Geometry, welds, connections and gas flow: the key points are inspected before shipping.
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Shipping
Ready to join you.
Reinforced packaging protects your exhaust in transit. The final step before giving your vehicle a new voice.
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