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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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  • ST Suspension ST X Coilovers - Audi A4 (B5)

    ST Suspension ST X Coilovers - Audi A4 (B5)

    Lowering Front - 40-70mmLowering Rear - 40-70mmNotes: NoneST Suspension ST X Coilovers - Ride Height AdjustableFront & rear axle weights can be found on the VIN plate which is normally found under...

    £747.00
    RRP £830.00
  • AP Coilovers - Audi A4 B5 Quattro (inc S4)

    AP Coilovers - Audi A4 B5 Quattro (inc S4)

    (1)

    Front axle weight can be found on a data label that is either under the bonnet on one of the inner wings or found on the B-pillar behind the door, the label will have this information:...

    (1)

    £594.90
    RRP £661.00
  • V-Maxx Xxtreme Coilover Kit - Audi A4 B5 2WD
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    V-Maxx Xxtreme Coilover Kit - Audi A4 B5 2WD

    Height and Damping Adjustable: Combining on-vehicle adjustment of both height and damping, this kit gives improved control over factory-set V-Maxx kits whilst still allowing easy height adjustment...

    £592.74
    Add to Cart The item has been added
  • AP Coilovers - Audi A4 B5 - 2wd upto 1999

    AP Coilovers - Audi A4 B5 - 2wd upto 1999

    Front axle weight can be found on a data label that is either under the bonnet on one of the inner wings or found on the B-pillar behind the door, the label will have this information:...

    £594.90
    RRP £661.00
  • AP Coilovers - Audi A4 B5 - 2wd 1999-2001

    AP Coilovers - Audi A4 B5 - 2wd 1999-2001

    Front axle weight can be found on a data label that is either under the bonnet on one of the inner wings or found on the B-pillar behind the door, the label will have this information:...

    £594.90
    RRP £661.00
  • 077-905-390 / 077905390 / 077.905.390
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    Plastic 2.0T Coil Pack Adapters - Push Fit Only

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    2.0T coilpacks in 1.8 20v Turbo motors have noticed a smoother idle and better feel under load.Awesome coilpack adaptors allow you run the 2.0TFSI coilpacks in your 1.8 20v Turbo engine vehicle...

    (1)

    £21.60
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  • Genuine Porsche 911 Oil Cap Genuine Porsche 911 Oil Cap
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    Genuine Porsche 911 Oil Cap

    (7)

    Black and satin aluminium coloured valve cover mounted oil cap from the Porsche 991 Do you want to give your engine bay a little bit of style, while at the same time getting a part that is just as...

    (7)

    £47.72
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  • Pipercross Cleaning Kit - C9000 Pipercross Cleaning Kit - C9000
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    Pipercross Cleaning Kit - C9000

    Pipercross Cleaning Instructions The cleaning of a Pipercross air filter should be carried out as below. Failure to do this could result in damage to the air filter or even the vehicle. Remove...

    £18.99
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    Newsouth Performance 'Audi White' Boost Gauge - GAU009 Newsouth Performance 'Audi White' Boost Gauge - GAU009
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    Newsouth Audi White Boost Gauge (GAU009)

    Key features include:- Our patent-pending DayNight feature gives you the ONLY Audi White gauge that lights in the day and dims at night with the instrument panel.- Computer-matched lighting to match...

    £69.01
    RRP £86.26
    Add to Cart The item has been added
  • Pipercross Audi A4 (B5) Panel Filter - 1.9TDI
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    Pipercross Audi A4 (B5) Panel Filter - 1.9TDI

    Type: Rect. Panel Length: 254 mm Width: 213 mm Internal: mm Height: mm Designed to directly replace your standard air filter element, Pipercross panel filters can be fitted in minutes for a...

    £41.99
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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.