Audi S4 B8 Performance Parts & Tuning Mods

Popular Brands for Audi S4 B8

The Audi S4 B8 is well supported in the aftermarket scene, with several top brands offering performance parts, tuning upgrades and styling mods. From exhausts and intakes to suspension kits and brake packages, you will find quality options from respected manufacturers below.

Exterior Styling Upgrades

You can give your Audi S4 B8 a much sharper, more aggressive look with a range of exterior styling mods, from body kits, splitters and diffusers to spoilers and custom grilles. These visual upgrades help your S4 stand out on the road while subtly hinting at the performance lurking underneath.

Suspension & Handling Upgrades

The Audi S4 B8 is a quick and capable daily, but from the factory it leans more towards comfort, with a tendency to understeer when pushed. The most noticeable handling upgrades start with tyres and brakes. A set of quality performance tyres transforms grip and agility straight away, while uprated brake pads, braided lines and performance discs give you stronger bite and better confidence on fast road runs or track sessions. Once you have that base sorted, suspension tuning makes the S4 feel far sharper. Lowering springs or a well matched coilover kit reduce body roll and bring the car’s centre of gravity down, improving stability and feedback in corners. Pair that with upgraded dampers, stiffer anti roll bars and fresh polyurethane bushes, and you take a lot of the factory softness out without killing ride quality. A front and rear strut brace can also tighten up the chassis response, so the car feels more eager to turn in and far more composed when you really lean on it.

Audi S4 B8 Performance Parts FAQ

What are the best first performance mods for an Audi S4 B8?

For a stock Audi S4 B8, the best starting point is usually an ECU remap, often called a stage 1 tune. A quality remap on the supercharged 3.0 TFSI brings a very noticeable lift in horsepower and torque, without needing any hardware changes.

After the remap, a high flow panel filter or intake kit and a less restrictive cat back exhaust system help the engine breathe better and sound the part. These basic upgrades work well together, are relatively straightforward to fit, and give a solid foundation for any further tuning.

How much power can I gain from a remap or ECU tune on my S4 B8?

A well written stage 1 ECU tune on a healthy Audi S4 B8 typically gives a strong bump in mid range torque and sharper throttle response, together with a useful increase in peak horsepower. Exact figures vary between tuners, fuel quality and whether the car is manual or S tronic, but most owners feel the difference straight away.

Going to a stage 2 setup with supporting hardware, such as an upgraded supercharger pulley, improved cooling and exhaust upgrades, can unlock further gains. The key is to use a reputable tuner who knows the S4 platform and can supply safe, reliable mapping rather than chasing headline dyno numbers.

Will tuning and performance upgrades affect the reliability of my Audi S4 B8?

Any performance tuning, whether it is a remap, pulley upgrade or exhaust mods, increases stress on engine and drivetrain components to some extent. However, if the car is well maintained and the upgrades are chosen sensibly, the S4 B8 can handle stage 1 and stage 2 power levels quite comfortably.

Keep on top of servicing, use quality oil, monitor supercharger belt and cooling system health, and avoid low quality or generic ECU files. If you push to higher stages or track use, consider supporting mods such as upgraded cooling, better brake pads and fluid, and possibly a gearbox tune for S tronic models to protect the clutches.

What supporting mods are recommended for a stage 2 Audi S4 B8 build?

For a typical stage 2 S4 B8, where you are running an upgraded supercharger pulley and higher boost, supporting hardware is important. At minimum, plan for an uprated intake, a freer flowing exhaust system and high quality spark plugs that can cope with the extra load.

Many owners also fit upgraded heat exchangers or cooling kits, since intake air temperatures can climb quickly on tuned supercharged engines. If your car has the S tronic gearbox, a TCU tune is worth considering to optimise shift points and clutch pressure for the added torque.

What wheel and tyre setups work well on a modified Audi S4 B8?

The Audi S4 B8 responds well to a subtle wheel and suspension upgrade. A common fitment is 19 inch alloys with a sensible width and offset that keeps everything inside the arches while improving stance. With the right rims and tyres, you can sharpen turn in and traction without ruining ride quality.

Lowering springs or coilovers paired with lightweight wheels help reduce body roll and improve grip, especially on tuned cars making more torque. Always check brake clearance if you are running big brake kits, and choose quality performance tyres to make the most of your power upgrades.

Is the Audi S4 B8 still good as a daily driver after tuning?

A well set up tuned S4 B8 remains an excellent daily driver. A stage 1 or mild stage 2 setup usually keeps factory like manners at low speed, with smooth cold starts and normal fuel consumption when cruising, but gives you much stronger acceleration when you want it.

The key is to avoid going too extreme on suspension, exhaust noise or track focused parts if you use the car every day. Sensible mods such as an ECU remap, intake, exhaust, upgraded brakes and tasteful wheels make the car quicker and more engaging without sacrificing comfort or refinement.

How much should I budget for basic performance upgrades on my S4 B8?

Costs vary by brand and spec, but as a rough guide, a quality stage 1 remap for the Audi S4 B8 is usually the most cost effective upgrade. Expect to budget separately for hardware like an intake kit, cat back exhaust and possibly a set of lowering springs or coilovers if you want handling improvements as well.

If you are planning a stage 2 build with a supercharger pulley and cooling upgrades, factor in extra for fitting, fresh fluids and a thorough health check. Spending a little more on proven performance parts and expert fitting often saves money in the long run by avoiding problems and repeat work.

Final Thoughts On The Audi S4 B8

The Audi S4 B8 is a cracking all rounder, with a punchy supercharged V6, a comfortable cabin and a drivetrain that responds really well to sensible tuning. In stock form it is quick, refined and usable every day, which is exactly why it is such a popular base for upgrades. With a few carefully chosen mods you can bring out a lot more character without ruining that everyday practicality that makes the S4 so appealing in the first place. We have seen plenty of S4 B8 builds where a quality remap, pulley upgrade and intake free up noticeable extra power and sharper throttle response, while a less restrictive exhaust adds some much needed drama without being antisocial. Handling wise, uprated springs or coilovers, better anti roll bars and a proper alignment transform the car from slightly soft and understeery into something that feels much more composed on B roads and track days. A brake upgrade, even just performance pads and lines, helps deal with heat and fade once you start using that extra pace. It is worth remembering the known weak spots when tuning. On higher torque setups the stock clutch or S tronic box can start to feel the strain, so many owners move to stronger clutch kits or upgraded gearbox software. Cooling and reliability mods are also popular, such as addressing typical issues like cooling system components and keeping on top of servicing when power is increased. Taken as a whole, the Audi S4 B8 is a brilliant platform for tuning that rewards a balanced approach. With the right mix of power upgrades, chassis tweaks and subtle styling, you can build a car that is quicker, sharper and more engaging, yet still happy to do the daily grind. We have seen many S4 B8 projects evolve in stages, each step making the car feel more personal to the owner. Start with solid, proven performance parts, keep reliability in mind, and you can turn your S4 B8 into something that suits your driving style perfectly, whether that means fast road, occasional track work or simply a more exciting commute.