Audi RS4 / RS5 B9: waking up the turbo V6, the complete exhaust system guide
The RS4 and RS5 B9 swapped the naturally aspirated V8 for a 450 hp 2.9 twin-turbo V6: quicker than ever, but far quieter, much to the regret of the RS community. It is THE criticism levelled at this generation, and it is exactly the problem our exhaust system solves: the twin-turbo V6 has a real voice, it just needs setting free. Here you will find everything that matters before configuring the exhaust for your Audi RS4 / RS5 B9 / B9.5 V6: catalytic converter, material, valves, tips and vehicle inspection.
Written by ROG Motorsport · Updated
Your ROG exhaust for the Audi RS4 / RS5 B9 / B9.5 V6
From €3,390 in stainless steel, €4,140 in titanium
Configure my exhaust- Vehicles
- Audi RS4 / RS5 B9 / B9.5 2.9 TFSI V6 (2019-2023)
- Engine
- 450 hp · 600 Nm
- Exhaust
- Valved cat-back, built for your VIN
- Material
- 304 stainless steel or titanium
- Front section
- Optional: catted downpipe with 200 or 100 cells, or decat
- Valves
- ROG remote, or factory control if your vehicle has it
- Lead time
- 20 working days from order confirmation to delivery
- Warranty
- 3 years, parts and workmanship
Closely related versions have their own guide: Audi A4 / A5 B9 2.0 TFSI, Audi S4 / S5 B9 3.0 TFSI V6, Audi RS4 Avant / RS5 Coupé B8.5 4.2 V8, Audi RS5 8T V8.
The Audi turbo V6: discreet power, too discreet
The turbo V6 in your RS4 / RS5 B9 is a remarkably effective engine: torque everywhere, flexibility and reliability. Audi calibrated it for performance without ostentation, and the factory exhaust takes that logic to near-total silence. Many owners tell us the same thing: they like the discretion, but they would like to be able to choose.
That is exactly what the ROG valved exhaust makes possible: with the valves open, the V6 reveals a deep, muscular sound the factory version gives no hint of, with crisp crackles on the overrun. With the valves closed, the factory discretion is fully intact.
What makes up the exhaust on your Audi RS4 / RS5 B9 / B9.5 V6
An exhaust system is best understood in two parts. Here is what each one does, and what ROG replaces.
The cat-back is the complete exhaust system
It is everything you can see under the chassis of your Audi RS4 / RS5 B9 / B9.5 V6, from the outlet of the front section to the tips: pipes, silencer, valves. This is the part where most of our research and development goes: it is what shapes the sound, and it is enough on its own to transform the car.
The front section, where the catalytic converter sits
On your Audi RS4 / RS5 B9 / B9.5 V6, that is the downpipe, the pipe leading from the turbo. It contains the factory catalytic converter: the second restriction in the exhaust, after the silencer. Replacing it is optional: it frees up the flow, and it is the ECU remap that turns that into horsepower.
The figures for your Audi RS4 / RS5 B9 / B9.5 V6
An exhaust system is judged first by ear and on the scales. The extra horsepower comes from an ECU remap.
Power
Torque
Published factory and Stage 2 figures.
The ROG exhaust works with or without an ECU remap. To get the full potential out of your Audi RS4 / RS5 B9 / B9.5 V6, we advise taking it to an approved tuning centre for a remap afterwards.
To be completely transparent: the exhaust alone mainly improves breathing and sound. The significant gains come with Stage 2, the exhaust plus an ECU remap at an approved tuning centre, and the Audi turbo V6 handles them with ease: it is a proven tuning base, documented for years.
Configuring your exhaust, step by step
3 choices, in the same order as the product page configurator.
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Step 1 of 3: Material: stainless steel or titanium
For your Audi RS4 / RS5 B9 / B9.5 V6, the exhaust costs €3,390 in stainless steel and €4,140 in titanium.
304 stainless steel
€3,390
- Weight
- Baseline
- Sound
- Full and rounded
The safe bet: strong, corrosion-proof, with a full, rounded sound. The best value for money.
Titanium
€4,140
- Weight
- Around 40% lighter
- Sound
- Metallic, crystal-clear
It makes the exhaust around 40% lighter for the same design. Its note is more metallic and clearer higher up the rev range, and its finish ranges from brushed to blued.
No worries on durability: 304 stainless steel shrugs off winter road salt and titanium does not rust. Stainless steel or titanium: what really changes.
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Step 2 of 3: Front section: downpipe and catalytic converter
Optional: the downpipe on your Audi RS4 / RS5 B9 / B9.5 V6, with its catalytic converter. Each option is placed on our sound scale of 0 to 10, valves open, with the factory exhaust at 3.
Cat-back only
Included
7/10Factory emissions control
The factory front section stays in place. It is already a complete transformation, and the choice of many of our customers.
200-cell sports catalytic converter
+€1,290
8/10Road use and inspection
More flow, emissions control retained: the right option for road use.
100-cell sports catalytic converter
+€1,290
9/10Inspection: depends on local rules
More open than the 200-cell: the sound hardens at high revs and emissions control is reduced.
Decat
+€880
10/10Track use
Flow with no filter at all: the rawest sound and the sharpest response.
Sound intensity, on a scale of 0 to 10
- 10/10Decat downpipe + ROG cat-back
- 9/10100-cell sports catalytic converter + ROG cat-back
- 8/10200-cell sports catalytic converter + ROG cat-back
- 7/10ROG cat-back only, factory catalytic converter retained
- 3/10Factory exhaust, for comparison
Valves open. With the valves closed, every configuration becomes discreet again.
What about the engine warning light? With a sports catalytic converter it can come on, because the rear oxygen sensor reads less cleaning. Nothing mechanical is wrong: an ECU remap or a session with a diagnostic tool sorts it out. Without a catalytic converter, you will need an ECU remap. If it happens to you, call us and we will point you in the right direction. Passing vehicle inspection with a sports exhaust.
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Step 3 of 3: Valves: ROG remote or factory control
Two ways to control the valves on your Audi RS4 / RS5 B9 / B9.5 V6.
ROG remote
A discreet control unit in the boot and a two-button remote: you open and close whenever you like, independently of the drive modes. For fitting, we support you by phone or by email.
Factory control
- Only for vehicles fitted with factory valves
- Controlled by the drive modes
For vehicles fitted with factory valves: the exhaust connects to their control and the drive modes stay in charge, with no extra control unit.
At 130 km/h, many sports exhausts drone. Here, with the valves closed, the exhaust flows through the silencer and stays composed when cruising; open, it makes itself heard when you choose. More about exhaust drone.
The ROG sound signature on the turbo V6
Our exhaust gives the V6 a deep, muscular voice, with assertive character under load and crisp crackles on the overrun with the valves open. The goal: a rewarding, controlled sound, never tiresome, that becomes completely discreet again with the valves closed. Two personalities, one exhaust.
From order to fitting
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Configuration
You configure the exhaust and enter the VIN from box E of your registration document or from the base of the windscreen.
-
Check
Your VIN is checked before any manufacturing begins.
-
Manufacturing
The exhaust is produced to order, for your vehicle.
-
Delivery
Free in Europe, insured parcel, tracking number from dispatch.
-
Fitting
Around two hours in the workshop, with no welding or cutting.
20 working days from order confirmation to delivery
- Warranty
- 3 years, parts and workmanship, from the date of delivery
- Payment
- In instalments with Klarna
- Installation
- At the garage of your choice
Is your Audi RS4 / RS5 B9 / B9.5 V6 still under the manufacturer's warranty? In Europe, the manufacturer cannot refuse it simply because a part from another brand has been fitted: it is up to them to prove that the fault stems from it. Our article on the manufacturer's warranty.
Our recommendations for your Audi RS4 / RS5 B9 / B9.5 V6
-
Daily driving
€3,390
- Stainless
- Cat-back only
- ROG remote
Your Audi RS4 / RS5 B9 / B9.5 V6 stays easy to live with, the factory emissions control is retained, and you open the valves whenever you choose.
View this configuration -
Fast road
€5,430
- Titanium
- 200-cell downpipe
- ECU remap
The best of both worlds: character and breathing, with emissions control retained.
View this configuration -
Track
€5,020
- Titanium
- Decat downpipe
- Stage 2
The most extreme configuration, for track use only.
View this configuration
Every Audi RS4 / RS5 B9 / B9.5 V6 has its own history and use: if none of these profiles sounds like you, let's talk it over.
Audi RS4 / RS5 B9 / B9.5 V6: your questions
How much power does an exhaust system add to the Audi RS4 / RS5 B9 / B9.5 V6?
From the factory, the Audi RS4 / RS5 B9 / B9.5 V6 produces 450 hp and 600 Nm. The exhaust alone acts first on sound, breathing and weight; the extra horsepower comes from an ECU remap. With a Stage 2 build, the published figures reach 530 hp and 830 Nm.
Stainless steel or titanium: which material for the Audi RS4 / RS5 B9 / B9.5 V6?
For the Audi RS4 / RS5 B9 / B9.5 V6, the ROG exhaust costs €3,390 in stainless steel and €4,140 in titanium. Stainless steel is the safe bet, with a full sound; titanium makes the exhaust around 40% lighter and gives a more metallic note higher up the rev range.
Do you need to replace the catalytic converter on the Audi RS4 / RS5 B9 / B9.5 V6?
It is not compulsory. The cat-back alone is enough to change the character of the Audi RS4 / RS5 B9 / B9.5 V6. Replacing the downpipe is how you go further, together with an ECU remap: 200 cells for the road, 100 cells or decat for more radical use.
Will a ROG exhaust pass vehicle inspection on the Audi RS4 / RS5 B9 / B9.5 V6?
The cat-back only and the 200-cell converter both retain emissions control: present the Audi RS4 / RS5 B9 / B9.5 V6 with the valves closed. With the 100-cell, acceptance at the emissions test depends on the car and local rules; the decat is intended for track use.
How is the ROG exhaust fitted to the Audi RS4 / RS5 B9 / B9.5 V6?
With clamps and gaskets, no welding or cutting: around two hours in the workshop for a well-equipped mechanic. The exhaust is built to the VIN of your Audi RS4 / RS5 B9 / B9.5 V6.
What does a ROG exhaust for the Audi RS4 / RS5 B9 / B9.5 V6 cost, and how long does it take?
From €3,390 to €5,430 depending on the configuration. Allow 20 working days from order confirmation to delivery. Delivery is free and the exhaust comes with a 3-year warranty.
Unsure about your configuration? Give us a call.
Between stainless steel and titanium, between the cat-back only and the full system, the right choice depends on how you drive and on your Audi RS4 / RS5 B9 / B9.5 V6. We take the time to talk it through before you order, with a reply within 24 hours. We are not here to sell to you over the phone: we help you choose, even if that means a cheaper option because it suits the way you drive.
ROG is a French brand, and the way we work comes down to one idea: an exhaust system should be sold with advice, not just a product page. More than 500 exhaust systems fitted and a rating of 4.9 out of 5.
Further reading
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