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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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  • Auto Finesse Oblitarate Tar Remover 500ml
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    Auto Finesse Oblitarate Tar Remover 500ml

    Powerful, heavy-duty solvent-based tar and glue remover Chemically dissolves stubborn sticky residues, overspray, fuel staining and traffic conerash Safe for use on all modern painted and...

    £14.95
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  • Auto Finesse Avalanche Snow Foam 1L
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    Auto Finesse Avalanche Snow Foam 1L

    Powerful, citrus-infused snow foam designed to linger for longer Breaks down, lifts and encapsulates bonded grime and harmful contamination Safe for use on all exterior surfaces including paintwork,...

    £16.95
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  • Auto Finesse Reactive Wheel Cleaner 1Litre
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    Auto Finesse Reactive Wheel Cleaner 1Litre

    Heavy duty spray-on wheel cleaner and heavy-hitting fallout remover in one solution Chemically dissolves embedded ferrous metal particles and brake dust into a safe, rinsablesolution Contains...

    £22.95
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  • Auto Finesse Dynamite Traffic Film Remover 1L
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    Auto Finesse Dynamite Traffic Film Remover 1L

    Heavy hitting, dilute-to-suit traffic film remover and heavy-duty pre-cleaner Dissolves and encapsulates the harshest soiling, bugs, salt and traffic films on contact Simple ‘spray and rinse’...

    £16.95
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  • Auto Finesse Revolution Wheel Soap 500ml
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    Auto Finesse Revolution Wheel Soap 500ml

    Deep cleansing, dilute-to-suit wheel soap safe for any type of alloy wheel Developed for safe use on the most sensitive aftermarket wheel finishes pH neutral solution with high-foaming surfactants...

    £12.95
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  • Auto Finesse Reactive Wheel Cleaner 500ml
    Add to Cart The item has been added

    Auto Finesse Reactive Wheel Cleaner 500ml

    Heavy duty spray-on wheel cleaner and heavy-hitting fallout remover in one solution Chemically dissolves embedded ferrous metal particles and brake dust into a safe, rinsablesolution Contains...

    £12.95
    Add to Cart The item has been added
  • Auto Finesse Lather Shampoo 1Litre
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    Auto Finesse Lather Shampoo 1Litre

    Powerful, ultra-concentrated, dilute-to-suit car shampoo Breaks away, lubricates and encapsulates harmful, abrasive grit and grime Heavy hitting cleaning agent packed with advanced surfactants,...

    £19.95
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  • Auto Finesse Micro Wash 500ml
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    Auto Finesse Micro Wash 500ml

    The best microfibre detergent for cleaning and reconditioning your microfibre cloths and accessories, Micro Wash is the professional solution to prolonging the life and effectiveness of all your...

    £16.95
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  • Auto Finesse Lather Shampoo 500ml
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    Auto Finesse Lather Shampoo 500ml

    Powerful, ultra-concentrated, dilute-to-suit car shampoo Breaks away, lubricates and encapsulates harmful, abrasive grit and grime Heavy hitting cleaning agent packed with advanced surfactants,...

    £12.95
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  • JXB Prop Shaft Carrier - B5 - Street Bushings JXB Prop Shaft Carrier - B5 - Street Bushings
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    JXB Prop Shaft Carrier - B5 - Street Bushings

    The stock center support bearing carrier holds the driveshaft in place with a layer of thin rubber. While that’s great for making sure no NVH makes it to the cabin, it doesn’t keep the bearing...

    £360.29
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  • JXB Prop Shaft Carrier - B5 - Track Bushings JXB Prop Shaft Carrier - B5 - Track Bushings
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    JXB Prop Shaft Carrier - B5 - Track Bushings

    The stock center support bearing carrier holds the driveshaft in place with a layer of thin rubber. While that’s great for making sure no NVH makes it to the cabin, it doesn’t keep the bearing...

    £360.29
    Add to Cart The item has been added
  • JXB Prop Shaft Carrier - B5 - Both Bushings JXB Prop Shaft Carrier - B5 - Both Bushings
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    JXB Prop Shaft Carrier - B5 - Both Bushings

    The stock center support bearing carrier holds the driveshaft in place with a layer of thin rubber. While that’s great for making sure no NVH makes it to the cabin, it doesn’t keep the bearing...

    £396.32
    Add to Cart The item has been added
  • RacingLine M14 x 1.50 Wheel Mounting Guide Pin (VWR630100) RacingLine M14 x 1.50 Wheel Mounting Guide Pin (VWR630100)
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    RacingLine M14 x 1.50 Wheel Mounting Guide Pin

    (1)

    RacingLine M14 x 1.50 Wheel Mounting Guide PinThe RacingLine Wheel Mounting Guide Pin is an essential addition to keep in your car's tool kit. By supporting the full weight of your heavy alloy wheel...

    (1)

    £21.60
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    APR A02 Flow Formed Alloy Wheels 19x8.5 5x112 - Anthracite APR A02 Flow Formed Alloy Wheels 19x8.5 5x112 - Anthracite
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    APR A02 Flow Formed Alloy Wheels 19x8.5 5x112 - Anthracite

    APR A02 Flow Formed Wheels pay homage to several classic wheels in a new and unique design that is sure to turn heads! Central to the wheel is a classic 5-spoke pattern that has been hollowed out...

    £1,516.66
    RRP £1,685.18
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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.