Valved Exhaust System for Audi RS4 / RS5 B9 / B9.5 2.9 TFSI V6 (2019-2025)
Configuration
Audi RS4 / RS5 B9 / B9.5 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 |
AudiA4 / A5 / S4 / S5 / RS4 / RS5 B9 / F5
The Audi RS4 and RS5 B9 exhaust in detail.
When Audi replaced the naturally aspirated V8 of the RS4 and RS5 with the 2.9 TFSI, a twin-turbo V6, torque jumped to 600 Nm for 450 hp, but the voice got lost along the way. The two turbos dampen the exhaust even before the system, which finishes the job. This page covers the B9 and B9.5 from 2019 to 2025; the RS4 and RS5 B8.5 with the 4.2 V8 have their own.
With the valves open, our valved cat-back removes what masks the twin-turbo: a muscular bass note under load, crisp crackles when you lift off the throttle, presence from start-up. With the valves closed, the gases flow through the silencer and the RS returns to a volume close to stock, which matters with a family estate like the RS4.
Upstream, the page’s “Manifold” option actually replaces the downpipes, which run from the turbos with their catalytic converters. Taken in 200-cell form, they leave emissions control in place; the 100-cell versions are accepted or not depending on the car and the rules in your country, and the decat pair is reserved for track use. Without a new map, 450 hp stays 450 hp: the benefit is limited to sound and a little weight saving.
Fitting with clamps and gaskets, no welding, about two hours on a lift; the tailpipes are oval. The RS drive modes keep control of the factory valves, or the Rog remote takes over. 304 stainless steel for a full bass, or titanium around 40% lighter for the same design, which adds a metallic note at high revs and comes in brushed, gold or purple.
Audi RS4 / RS5 B9 / B9.5 2.9 TFSI V6 exhaust specifications.
| System type | Valved cat-back (valve exhaust), oval tailpipes, built to your VIN |
|---|---|
| Vehicles and chassis code | Audi RS4 Avant and RS5 Coupé B9 and B9.5 2.9 TFSI; RS5 Sportback: own rear section |
| Engine | 2.9 TFSI, twin-turbo V6, 450 hp and 600 Nm |
| Years | 2019-2025 |
| Materials and finishes | 304 stainless steel or titanium; titanium in brushed, gold or purple |
| Valves | Factory control through the drive modes, or 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 | Made to order, 20 working days from confirmation to delivery, free delivery |
| Warranty | 3 years, parts and workmanship |
Questions about the Audi RS4 / RS5 B9 / B9.5 2.9 TFSI V6 exhaust.
My RS5 B9.5 dates from 2024: does the page cover it?
The page runs to the 2025 model year: 2024 is therefore covered for the cat-back. For a later model year, the VIN lets us check what exists before any order.
Which Stage 2 figures for the RS4 B9?
No ECU remap needed for the cat-back. With the downpipes and a suitable map at an approved tuner, the published figures for the 450 hp 2.9 TFSI reach 530 hp and 830 Nm.
Can the RS4 B9 keep its Rog system on vehicle inspection day?
Close the valves before the inspection: the V6 becomes discreet again. Cat-back alone or 200-cell downpipes, the gases remain treated. With 100-cell downpipes, acceptance depends on the car and the rules in your country; in decat form, they restrict the RS4 to track use.
On the motorway, does the RS5 B9 resonate with the exhaust?
With the valves closed, the silencer works like a cruising exhaust: no drone at a steady speed. You open the valves when you decide, through the remote or the drive mode.
Audi RS4 / RS5 B9 / B9.5 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
Best valved exhaust for Audi RS4 and RS5 B9
For an Audi RS4 Avant or an RS5 Coupé of the B9 generation, the best valved exhaust is the one made to your VIN, with a sound you choose, to give the twin-turbo V6 its voice back. That is what...
In detail
Rog Advisor
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Fitment, sound, catalyst, valves, delivery: the answer comes straight away, with your configuration in context.
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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.
-
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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