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Audi A4 (B5) Tuning & Performance Parts

The B5 S4 has always had a bit of a cult following, and the 2.7 biturbo is a big part of why. At Awesome GTI, you’ll find Audi S4 B5 tuning parts for owners who want to refresh the car or take the performance further.

Some owners are chasing more power, while others are focused on tightening up an ageing setup or changing the look. Our S4 B5 range covers both, with parts selected specifically for the model and clear fitment information to help you choose with confidence.

Audi S4 B5 Parts: Bodystyling and Braking

The B5 has a shape that doesn’t need much messing with, so the right exterior parts can make a noticeable difference without changing the character of the car. At Awesome GTI, the Maxton Design Rear Diffuser is available for the Avant, while the Maxton Design Gloss Black Front Splitter adds more definition to the front end.

Brakes are worth paying just as much attention to, especially on an older performance car. We stock options including the EBC Redstuff Front Pads and Tarox Strada Front Brake Pads, giving you different routes depending on how you use the car and what you want from the pedal feel.

If you’re not sure which setup suits your S4 B5, the Awesome GTI team can help you compare the options before you order.

Why S4 B5 Owners Choose Awesome GTI

We've been fitting and upgrading VW, Audi, SEAT and Skoda cars since 1989. The B5 platform is one we still know well after this many years of them coming through the workshop. If you're after Audi S4 tuning beyond bolt-on parts, that's usually a conversation rather than a click. Our APR remap route covers the Audi S4 B5 remap side through a proper consultation. Our own Dynojet 4WD dyno checks the results properly afterwards.

That said, most owners start with the parts they can see. Contact the Awesome GTI team for advice on either route, or browse our Audi S4 B5 performance parts below and get your next job underway.

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  • H&R Front Only Anti Roll Bar Kit - FR:32mm - A4 (B5) 2WD + 4WD
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    H&R Front Only Anti Roll Bar Kit - FR:32mm - A4 (B5) 2WD + 4WD

    H&R Front Only Anti Roll Bar Kit-FR:32mm - A4 Lim.+Avant/Sedan+SW -Typ B5 (8D), 2WD + 4WD-11/94>Designed to reduce body roll, increase lateral stiffness and improve handling, H&R sway Bars are...

    £364.15
    RRP £383.32
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  • H&R Anti Roll Bar Kit - FR:32/RE:17mm - A4/RS4 Quattro (B5)
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    H&R Anti Roll Bar Kit - FR:32/RE:17mm - A4/RS4 Quattro (B5)

    H&R Anti Roll Bar Kit-FR:32/RE:17mm - A4/RS4 Lim./Sedan+Avant/Quattro -Typ B5, 4WD-09/98>Designed to reduce body roll, increase lateral stiffness and improve handling, H&R sway Bars are crafted from...

    £518.06
    RRP £545.33
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  • H&R Anti Roll Bar Kit - FR:32/RE:21mm - A4/S4/RS4 Quattro (B5) Track Version
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    H&R Anti Roll Bar Kit - FR:32/RE:21mm - A4/S4/RS4 Quattro (B5) Track Version

    H&R Anti Roll Bar Kit-FR:32/RE:21mm - A4/S4/RS4 Lim./Sedan+Avant/SW Quattro -Typ B5, 4WD, Sportversion-09/98>Designed to reduce body roll, increase lateral stiffness and improve handling, H&R sway...

    £553.64
    RRP £582.78
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  • ECS Magnetic Manual Gearbox Plug M22 ECS Magnetic Manual Gearbox Plug M22
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    ECS Magnetic Manual Gearbox Plug M22

    ECS Magnetic Manual Gearbox Plug Replace your 12-Point triple square with a standard 17mm head magnetic drain plug.Magnetic Transmission Drain Plugs from ECS Tuning for your V/W & Audi. ECS MAGNETIC...

    £44.58
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    Forge Splitter R Recirculating Blow Off Valve 1.8T Forge Splitter R Recirculating Blow Off Valve 1.8T

    Forge Splitter R Recirculating Blow Off Valve 1.8T

    Forge Splitter R Recirculating Blow Off Valve 1.8T The Splitter is a truly remarkable valve that gives a combination of blow off and recirculation valve operation, all at the same time, and has been...

    £137.69
    RRP £149.99
  • ECS Coil Pack Hold Down Kit ECS Coil Pack Hold Down Kit

    ECS Coil Pack Hold Down Kit

    A creative & attractive solution for your coil pack "popping" problem Ever open the hood of your 1.8t & find your push-down coil packs popping out or completely popped out of their secured...

    £135.92
  • Genuine Audi R8 Coolant Cap
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    Genuine Audi R8 Coolant Cap

    (1)

    Genuine Audi R8 coolant cap.Fits all VAG models from 1999 onwards. NOTES:The R8 Coolant cap fits but it is 90í«_ rotated from where it should really sit... ie the logo is upside down or sideways.On...

    (1)

    £152.40
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Frequently asked questions

How much power can an Audi S4 B5 2.7 V6 Biturbo make with tuning?

There's plenty of potential in the Audi S4 B5 2.7 biturbo V6, but the final figure depends on the software, hardware and condition of the car. A more involved Audi S4 B5 tuning setup can go well beyond standard power, although the car needs to be built around the level you're aiming for rather than chasing a figure on its own.

Is an Audi S4 B5 remap worth it?

An Audi S4 B5 remap can make a noticeable difference to the way the 2.7 biturbo delivers its power without immediately moving into major hardware changes. The condition of the car still matters, though. On an older B5, we'd want to know the engine is healthy before increasing boost or asking more from the standard components.

Which Audi S4 B5 performance parts make the biggest difference?

That depends on what you want from the car. ECU tuning is an obvious option if more power is the goal, while cooling and exhaust upgrades become more relevant as the setup develops. Awesome GTI stocks Audi S4 B5 performance parts for different levels of build, so you can plan the car around how you actually intend to use it.

What should I check before tuning my Audi S4 B5?

Start with the condition of the car. Service history and any previous modifications matter just as much as the Audi S4 B5 parts you're planning to add. Any faults or overdue maintenance should be sorted first. If you're unsure what your B5 needs before tuning, the Awesome GTI team can inspect the car and talk through the next step with you.