Valved Exhaust System for Audi S8 D5 4.0 TFSI V8 (2020+)
Configuration
Audi S8 D5 4.0 TFSI V8 Valved Exhaust System (2020+)
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 |
The Audi S8 D5 exhaust in detail.
The S8 D5 pushes the twin-turbo 4.0 TFSI to 571 hp and 800 Nm, in a large saloon designed so that nothing filters through to the cabin. S8 D5s built since 2020 are covered by this page. The V8 S8 D4 and V10 D3 have their own system.
This silence comes at a price: the V8, with its turbos housed in the vee, has almost no voice left. With the valves open, our valved cat-back gives it back: a deep bass note from start-up, acceleration you can finally hear, a few crackles when you lift off. With the valves closed, the gases pass through the silencer and the S8 resumes its role as a lounge on wheels, with no drone on the motorway.
Fitting touches nothing else: band clamps, gaskets, no welding and two hours in the workshop on average, with four round tailpipes at the rear. The driving modes keep control of factory valves; without them, the Rog remote, with its unit in the boot and two buttons, does the job.
The “Manifold” option on the page replaces the downpipes, the first parts after the turbos, which carry the catalytic converters. A limousine of this class rarely goes on track: the 200-cell version, which preserves emissions control, suits it best, with the 100-cell accepted or not depending on the car and the rules in your country and the decat version reserved for track use. We publish no Stage 2 figures for the D5, and without an ECU remap its 571 hp do not change: the part only brings sound and a little less weight. 304 stainless steel and titanium, the latter around 40% lighter and offered in three colours, are both available.
Audi S8 D5 4.0 TFSI V8 exhaust specifications.
| System type | Valved cat-back (valve exhaust), four round tips, built to your VIN |
|---|---|
| Vehicle and chassis code | Audi S8 D5 4.0 TFSI V8 |
| Engine | 4.0 TFSI, twin-turbo V8, 571 hp and 800 Nm |
| Years | 2020+ |
| Materials and finishes | 304 stainless steel or titanium; titanium in brushed, gold or purple |
| Valves | Factory valve control if fitted, 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 |
| Manufacturing and delivery | Built to your VIN, 20 working days, free delivery |
| Warranty | 3 years, parts and workmanship |
Questions about the Audi S8 D5 4.0 TFSI V8 exhaust.
My S8 D5 is a 2025 model: is it covered?
The page covers S8 D5s built since 2020, 2025 models included. Send us the VIN before ordering: we check and reply before any manufacturing.
Is there a published Stage 2 for the S8 D5?
Not on this page. The cat-back works with the factory map and the V8 keeps its 571 hp; the downpipes only translate into power with an ECU remap, whose figures we do not publish here.
How should a valved S8 D5 be presented at vehicle inspection?
With the valves closed, the saloon returns to the discretion it had on delivery. Cat-back alone or 200-cell downpipes: the catalytic converters keep treating the gases. 100-cell downpipes are accepted or not depending on the vehicle and your country’s rules, and their version without a catalytic converter is for the circuit only.
Is the Rog remote useful on an S8 D5?
Only if the car has no factory valves. Otherwise, the exhaust connects to their control and the Audi’s drive modes decide, just as they did when it left the factory.
Audi S8 D5 4.0 TFSI V8: 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 S8 D5 4.0 TFSI V8: 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 S8 D5: giving the 4.0 TFSI V8 its voice back, the complete guide
The S8 D5 is the limousine for people in a hurry: 571 hp of twin-turbo V8 under the profile of an executive grand tourer. It is completely discreet in sound, and that is deliberate. But our S8 customers all share...
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.
Unsure about your configuration? Talk to us before you order. We know your car. Write to us at contact@rogmotorsport.com: we reply in writing, in English, within 24 hours. Email us
Reviews imported from our previous system and translated from French; verified purchases carry the badge.
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.
-
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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