Valved Exhaust System for Audi S4 / S5 B9 3.0 TFSI V6 (2019-2025)
Configuration
Audi S4 / S5 B9 3.0 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 |
AudiA4 / A5 / S4 / S5 / RS4 / RS5 B9 / F5
The Audi S4 and S5 B9 3.0 TFSI exhaust in detail.
This system is for the petrol-engined S4 and S5 B9: the 3.0 TFSI, a 354 hp, 500 Nm turbocharged V6, for the 2019 to 2025 model years. The S4 and S5 TDI, sold in Europe in the same generation, are not covered by this page. The supercharged S4 and S5 B8, the S5 8T and the RS4 and RS5 B9 have their own systems.
Everything is designed to keep this V6 discreet: the turbo breaks up part of the noise, the factory exhaust takes care of the rest. Many owners like this restraint, but would like to be able to choose. With the valves open, our valved cat-back gives the V6 a deep, muscular voice, assertive under load, with crisp crackles on lift-off. With the valves closed, the S4 becomes the quiet grand tourer you know again.
Four round exits finish a system fixed with clamps and gaskets, without any welding, in about two hours in the workshop. If your S5 has its factory valves, the drive modes stay in control; otherwise, a box in the boot and a two-button remote do the job.
On this turbo V6, the “Manifold” option corresponds to the downpipe, the part that carries the catalytic converter at the turbo outlet. Chosen with 200 cells, it preserves the V6’s emissions control; with 100 cells, its acceptance varies depending on the car and the rules in your country, and its decat version is reserved for track use. As long as the ECU is not remapped, the S4 keeps its 354 hp and gains only sound and a little less weight. Stainless steel remains the most common choice, but titanium, around 40% lighter for the same design, appeals to those who want a brushed, gold or purple finish.
Audi S4 / S5 B9 3.0 TFSI V6 exhaust specifications.
| System type | Valved cat-back (valve exhaust), four round tips, built to your VIN |
|---|---|
| Vehicles and chassis code | Audi S4 saloon and Avant and S5 Sportback B9 3.0 TFSI petrol (same system); S5 coupé and convertible: own rear section; TDI versions not covered |
| Engine | 3.0 TFSI, turbocharged petrol V6, 354 hp and 500 Nm |
| Years | 2019-2025 |
| Materials and finishes | 304 stainless steel or titanium; titanium in brushed, gold or purple |
| Valves | Factory drive modes or the Rog remote |
| Front section (option) | Downpipe with 200-cell or 100-cell catalytic converter, or decat |
| Fitting | Clamps and gaskets, no welding, about 2 hours on a lift |
| Manufacturing and delivery | Built to your VIN, 20 working days, free delivery |
| Warranty | 3 years, parts and workmanship |
Questions about the Audi S4 / S5 B9 3.0 TFSI V6 exhaust.
Can my S4 B9 TDI take this system?
No, this system was designed for the petrol S4 and its 354 hp V6 3.0 TFSI. For an S4 or S5 TDI, contact us with the VIN before ordering: we will tell you what exists for your version.
Which Stage 2 on an S5 B9 3.0 TFSI?
The cat-back alone keeps the factory map. With the downpipe and an ECU remap at an approved tuning centre, the published figures for this V6 reach 440 hp and 670 Nm. A sport catalytic converter can trigger the engine warning light without an ECU remap.
Audi S4 / S5 B9 3.0 TFSI V6 with a Rog exhaust: what should you know about vehicle inspection?
With the valves closed, it returns to a sound close to factory. On the exhaust gas side, the cat-back alone or the 200-cell downpipe let the catalytic converter do its work. In 100-cell form, the answer depends on the vehicle and your country’s rules; a decat S4 is reserved for track use.
Sportback, Avant, convertible: which S5 and S4 B9 models are compatible?
The S4 saloon, the S4 Avant and the S5 Sportback take the same Rog system. The S5 coupé and convertible have their own rear section: for them, send us the VIN and we confirm the system before manufacturing. Only the 3.0 TFSI petrol engine is covered.
Audi S4 / S5 B9 3.0 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 S4 / S5 B9 3.0 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 S4 B9: waking up the turbo V6, the complete exhaust system guide
The S4 B9 and its 3.0 turbo V6 make a fast, effective saloon that is acoustically absent. It is the ultimate Audi sleeper, and our S4 customers all want the same thing: keep that discretion during the week and wake...
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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