Best valved exhaust for Audi S5 Coupé 8T V8

Your vehicle.

All our exhausts for this generation, version by version, are brought together on one page: Audi A4 / A5 / S4 / S5 / RS4 / RS5 B8 / 8T Valved Exhaust.

The first S5 in history, the 8T arrived at the same time as the A5 coupé, with an argument that later generations would no longer have: a naturally aspirated V8. No turbo to smooth its voice, an immediate response to the throttle, power that climbs to the top of the rev counter. A Rog exhaust is dedicated to it. Here is what you need to know about your coupé before configuring it.

Body style

Two-door coupé (S5 8T)

Years

Presented in March 2007; in Europe, the 2011 facelift replaces the V8 with a V6; the product page targets 2007 to 2012

Engine

4.2 FSI: naturally aspirated V8 of 4,163 cc, direct injection

Factory output

354 hp (260 kW), at 7,000 rpm

Drivetrain

quattro, basic split 40% front and 60% rear; six-speed manual transmission or tiptronic

Tailpipes

Four tips, two on each side

Neighbors in the range

S5 convertible and Sportback with 3.0 TFSI V6, RS5 8T with V8

The first S5, a V8 coupé

Audi unveiled the A5 and the S5 together at the Geneva show in March 2007, and opened orders for both coupés as soon as they were presented. It was a break with the brand's habit, which until then launched its S versions several months after the base model.

In this first generation, only the coupé received the V8. The convertible, which appeared later, and the five-door Sportback were offered as S5 with the supercharged 3.0 TFSI V6, which the coupé itself adopted in Europe with the 2011 facelift. These V6 S5 models have their own product page and their own guide, as does the RS5 8T, whose 4.2 V8 revs even higher.

Versions and factory power

There is only one state of tune of the V8 on the S5 8T: 354 hp (260 kW), reached at 7,000 rpm, with a maximum torque available from 3,500 rpm. At launch, with the manual transmission, Audi quoted 0 to 100 km/h in 5.1 seconds, speed limited to 250 km/h.

The Rog product page for this coupé comes from our former catalog. Before making your exhaust, we compare your VIN with our technical reference. A second product page, S5 B8 Coupé 4.2 V8, targets the same car: your VIN tells us which to retain, and we tell you in writing before the order.

Stage 2: published figures with the front section and an ECU remap carried out by a tuner.

quattro and transmissions

The S5 8T is a permanent quattro. At rest, its center differential sends 40% of the torque to the front and 60% to the rear, and this split then varies according to the grip of each axle.

At launch, the S5 was offered with a six-speed manual transmission; a tiptronic automatic version was also sold. For the exhaust, the transmission changes nothing: your VIN is enough to check that the exhaust matches your car.

The 4.2 FSI, a V8 that loves revs

The 4.2 FSI is a V8 of 4,163 cc with direct gasoline injection, with no forced induction at all. Its strength lies in its linearity: the push increases with revs, and maximum power only arrives at 7,000 rpm. It is an engine that asks to be revved, and rewards those who do.

It can nevertheless be supple: its maximum torque arrives from the middle of the rev counter, so the S5 drives calmly in town, on a trickle of throttle, before going for the red zone as soon as the road clears. This dual character, a touring coupé on one side, a sports car with a raging engine on the other, is exactly what a valved exhaust allows you to extend at the exhaust.

On a naturally aspirated engine, the front section of the exhaust comprises the manifolds, at the outlet of the cylinder heads, and the catalytic converters. The cat-back begins after them: pipes, muffler, valves and four tips. It gives the S5 most of its voice, and it is what the Rog exhaust replaces first.

The sound of a naturally aspirated V8

A V8 without a turbo has a complete voice: a deep rumble at idle, rich mid-range, and a crescendo that brightens as the needle approaches the red zone. Nothing filters the pulsations between the cylinder heads and the exhaust, which leaves all the room to the exhaust.

As standard, at part load, the S5 keeps this rumble well in the background, and it is mostly high in the revs that its V8 makes itself heard. It is precisely the middle range, where you drive most often, that the factory exhaust smothers.

What the factory exhaust holds back

As standard, the S5 8T has a heavy, heavily filtered exhaust, designed so that a large coupé stays pleasant on long stages. It fulfils that role, but at the price of the V8's richness in the mid-range, the very thing that gives a naturally aspirated eight-cylinder its charm.

With a valved exhaust, you choose the moment. With the valves open, the gases bypass the muffler chambers, and the V8 climbs in a single sweep, first rasping then ever clearer. With the valves closed, the S5 returns to a level close to factory, for leaving a sleepy neighborhood or driving long on the highway without tiring your passengers.

Valves, character and remote

On the S5, the Rog exhaust's valves are delivered in place, controlled by a remote and a control unit stored in the trunk. One press to open, another to close: in between, they do not move, however you drive. You decide when the V8 speaks.

As for character, the price does not change: straight pipe for all the grain of the eight-cylinder, or resonator, which lends the V8 a rounder and slightly softer voice, the coupé remaining fully sporty.

Four tips and materials

The S5 8T is recognized by its four outlets, two on each side of the rear bumper, and the Rog exhaust keeps this signature. You choose there Rog tips in chrome, gloss black or blued titanium, included in the price, or no tips.

304 stainless steel gives the V8 a full sound and stands up to winter salt. Titanium removes about 40% of the mass for the same layout, brings out the V8's treble at high revs, and comes in brushed, gold or purple at no extra cost.

What the product page covers

Besides the cat-back, the S5's product page offers as an option the front section and its catalytic converters, presented under the word "Manifold": in 200-cell, in 100-cell, or catalyst-free, a version intended for the track. For an S5 that still goes out often on the road, the 200-cell, which keeps emissions control, is the most coherent choice.

Fitted on its own, the cat-back leaves the V8 with its management and its 354 hp standard: it changes the voice, not the data sheet. On a naturally aspirated engine, the front section first improves breathing and sound; the power gain remains modest and comes through a remap, a tuner's business. Made from your coupé's VIN, the exhaust is fitted at your garage, without welding or cutting.

Configure your exhaust.

How the exhaust is put together

On the S5 coupé 8T, the Rog cat-back follows on from the front section and leads the V8's gases to the four tips, with its pipes, its mufflers and its valves. The front section is the manifolds and catalytic converters of the 4.2 FSI, grouped in the "Manifold" option of the product page.

Each choice explained in detail, from sound to material: How to configure your exhaust.

Three recommended configurations.

• The everyday coupé

  • Stainless steel
  • No manifold
  • Resonator
  • Rog remote

  For an S5 that runs all year round: the V8 regains its mid-range, the voice stays round for the passengers, and the factory front section keeps its place.

  View this configuration

• Sunday drive

  • Stainless steel
  • 200-cell sports catalytic converter
  • Straight pipe
  • Rog remote

  For an S5 taken out in fine weather on country roads: the eight-cylinder breathes better, climbs more freely through the revs, and emissions control stays in place.

  View this configuration

• V8 at high revs

  • Titanium
  • 200-cell sports catalytic converter
  • Straight pipe
  • Rog remote

  For the enthusiast who likes to hold the gears: the titanium lightens the rear of the coupé and makes the V8 sing clearer as the red zone approaches.

  View this configuration

From order to fitting.

VIN, manufacture, delivery, fitting and warranty, step by step

Questions.

Further reading.

• All our exhausts for Audi A4, A5, S4, S5, RS4 and RS5 B8 / 8T
• Exhaust for V8 engines
• Guide to the Audi RS5 coupé and convertible 8T V8
• Guide to the Audi S5 8T V6