Best valved exhaust for Audi A4 and A5 B8 / B9 2.0 TFSI

Your vehicle.

All our exhausts for these two generations, version by version, are brought together on two pages: Audi A4 / A5 / S4 / S5 / RS4 / RS5 B8 / 8T Valved Exhaust and Audi A4 / A5 / S4 / S5 / RS4 / RS5 B9 / F5 Valved Exhaust.

This guide brings together the A4 and A5 with the 2.0 TFSI engine from two generations: the B8, then the B9. Each has its own product page; your VIN confirms the right one, and for the A5 B9, whose rear section depends on the body style, it also confirms the exhaust.

A4 and A5 B8

2.0 TFSI, from 2008 to 2016: from 180 to 230 hp and from 320 to 350 Nm depending on the version

A4 and A5 B9

2.0 TFSI, from 2017 to 2021: 252 hp and 370 Nm, or 190 hp and 320 Nm

Body styles

A4 saloon and Avant, A5, body style confirmed by the VIN

Engine

2.0-litre direct-injection turbo four-cylinder

Emissions control

Catalytic converter in the downpipe

Factory valves

Controlled by the drive modes on cars fitted with them

What holds back the factory sound

The 2.0 TFSI pulls early and makes these Audis lively; but the turbo already filters part of the sound, and the factory exhaust lets out only a flat hum.

What the Rog exhaust changes

With the Rog exhaust and the valves open, the Audi gains a crisp grain at start-up, acceleration you can hear and little cracks on the overrun; with the valves closed, it regains the discretion of a cruiser. Power only changes with the downpipe and a remap: here are the published figures.

Published factory and Stage 2 figures, with a remap.

Closely related versions have their own guide: Audi S4 / S5 B8 3.0 TFSI V6, Audi A4 / A4 Avant B8 3.2 FSI V6, Audi RS4 / RS5 B9 / B9.5 2.9 TFSI V6.

Choosing your exhaust.

Five decisions, in this order: each one builds on the one before, and the last no longer affects the sound. Before you start, here is what you are buying.

Your exhaust, in two parts

1. 1

   Step 1 of 5: Sound: the voice of your car

   An exhaust's sound is shaped in three places: its character, which you choose here; its intensity, which depends on the front section (step 3); and the volume of the moment, which you set with the valves (step 4).

   The character

   At the same price, two characters: the straight pipe, to hear the raw sound of the engine, unfiltered; the resonator, for a rounder, slightly softer voice. With either one, the exhaust stays fully sporty.

   

   Pure · straight pipe

   Same price

   

   Round · resonator

   Same price

   Our advice. The straight pipe if you want to hear your engine unfiltered, the resonator if you prefer a rounder voice. Exhaust resonator: what does it do?.

2. 2

   Step 2 of 5: Material: stainless steel or titanium

   The material changes three things: weight, sound and durability. It is a genuine technical choice, not just a matter of looks.

   304 stainless steel

   Base price

   Weight

   Baseline

   Sound

   Full and rounded

   Durability

   Withstands salt and winter

   Tough, corrosion-proof, with a full, rounded sound. The choice of most of our customers.

   Titanium

   Optional

   Weight

   Around 40% lighter

   Sound

   Metallic, crystal-clear

   Durability

   Does not rust

   Around 40% lighter than stainless steel for the same design, with a more metallic sound that turns crystal-clear at high revs. You then choose it in one of three colours, at the same price (step 5).

   Our advice. Stainless steel for a first purchase and everyday use; titanium if you are chasing every kilo and want a higher-pitched note at high revs. Over time, both last. Stainless steel or titanium: what really changes.

3. 3

   Step 3 of 5: Front section: sports catalytic converter or decat

   On your car, the front section is the downpipe, at the turbo outlet: that is where the catalytic converter sits. After the exhaust itself, it is the part that matters most, for sound as well as for breathing. It is optional; on the product page, this option is called “Manifold”: it is the same part, catalytic converter included.

   Cat-back only

   Included

   7/10

   Factory catalytic converter retained

   You keep the factory front section. It already makes it a different car: most of our customers start here.

   200-cell sports catalytic converter

   Optional

   8/10

   Road use and inspection

   Emissions control stays in place, flow improves markedly and the sound gains presence. Our choice for the road.

   100-cell sports catalytic converter

   Optional

   9/10

   Inspection: depends on the vehicle

   Half as many cells: more breathing and more aggression at high revs.

   Decat

   Optional

   10/10

   Track use

   No emissions control: maximum flow and raw sound, for the track.

   Sound intensity, on a scale of 0 to 10

   1. 10/10Decat downpipe + Rog cat-back
   2. 9/10100-cell sports catalytic converter + Rog cat-back
   3. 8/10200-cell sports catalytic converter + Rog cat-back
   4. 7/10Rog cat-back only, factory catalytic converter retained
   5. 3/10Factory exhaust, for comparison

   Valves open. With the valves closed, every configuration becomes discreet again.

   Our advice. Your reference point is a score out of 10: 7 with the exhaust alone, 8 to 9 with the 200-cell sports catalytic converter, 10 with the decat version, for the track. With a remap by a tuner, it is also the front section that unlocks the power (see “Your vehicle”).

   

   What about the engine warning light? With a sports catalytic converter, it can come on with some engines: the sensor placed after the catalytic converter measures a different level of emissions control from the original. It is not a mechanical fault, and a remap by a tuner sorts it out. The decat version almost always triggers it. Passing inspection with a sports exhaust.

4. 4

   Step 4 of 5: Valves: our remote or your factory valves

   The valves set the volume at every moment: closed, the gases pass through the silencer and the car keeps a sound close to the factory one; open, they take the shortest route. All that remains is to choose who controls them.

   Rog system and remote

   Included

   

   The exhaust comes with our valves fitted and a two-button remote, open and closed; a small control unit fits in the boot. The valves stay in the position you choose, whatever the drive mode: open, they stay open; closed, they stay closed.

   Your factory valves

   Included

   • If your car has factory valves
   • Controlled by the drive modes

   If your car has factory valves, we deliver the exhaust with mounting points for them: your garage refits your valves there, and everything works as before, through the drive modes.

   

   Our advice. The remote if you want to decide for yourself, at any time; your factory valves if you value the standard drive modes. For inspection, present the car with the valves closed. On track, open them: that is where they come into their own.

   On the motorway, with the valves closed, the gases pass through the silencer, designed for cruising: no drone at a steady speed. You open up when you feel like it, not when the motorway decides for you. Why our exhausts stay calm on the motorway.

5. 5

   Step 5 of 5: Looks: titanium colour and tips

   The last step, and the freest. The titanium colour and the tips are purely aesthetic choices: they change nothing about the sound or the performance of the exhaust. Choose them with your eyes.

   The titanium colour

   Three colours, at the same price: brushed, gold or purple. They only apply to titanium; in stainless steel, the exhaust keeps the colour of the steel.

   

   

   

   The tips

   Rog tips in chrome, gloss black or blued titanium, included in the price. You can also order the exhaust without tips.

   

   

   

Three set-ups, three uses.

If you are still unsure, start from how you use the car: here are the three set-ups we recommend most often for your car.

• Everyday

  • Stainless steel
  • Cat-back only
  • Rog remote

  Your car finds its voice, the factory emissions control stays in place, and you open the valves when you decide.

• Fast road

  • Titanium
  • 200-cell sports catalytic converter

  More sound and more breathing, with emissions control retained. With a remap, it is the basis of a Stage 2.

• Track

  • Titanium
  • Decat

  For the track: maximum flow and raw sound. And on track, the valves stay open.

From order to installation.

1. Configuration

   You choose your exhaust and enter your VIN, found in box E of your registration document.

2. Check

   We check compatibility with your VIN before manufacturing begins.

3. Manufacturing

   Your exhaust is made to order, for your car.

4. Delivery

   Free, insured to your door, tracked from dispatch.

5. Installation

   At your garage, with no welding or cutting: clamps, new gaskets and roughly two hours on a lift.

20 working days from order confirmation to delivery

Warranty

3 years, parts and workmanship, from the date of purchase

Payment

Card, PayPal or bank transfer

Installation

By the garage of your choice

Every exhaust is made to your VIN and checked before production: it fits your car perfectly.

Questions.

Further reading.

• All Audi exhaust systems
• Audi S4 / S5 B8 3.0 TFSI V6
• Exhaust resonator: what does it do?
• Downpipe: what is it and what does it do?
• Stage 2: the role of the downpipe
• How to pass vehicle inspection with a modified exhaust
• Exhaust and manufacturer's warranty: what you need to know
• All the brands we cover