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Let's find your parts.
Start with your car.

Ford Focus ST225 Performance Parts & Upgrades

Upgrade your MK2 Ford Focus ST225 with performance parts from leading brands, including AIRTEC, Cobra, SuperPro, Forge Motorsport and Genuine Ford.

Browse induction kits, intercoolers, exhaust systems, suspension upgrades, brake components, clutches, engine mounts and servicing parts designed for the 2.5-litre turbocharged Focus ST.

Not sure where to begin? Read our Focus ST225 tuning guide for advice on the most effective upgrades, common problems and recommended modifications for different power goals.

Shop Focus ST225 parts by category

Showing 110 of 110 products

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Showing 110 of 110 products

Showing 110 of 110 products
  • Scorpion 3" downpipe for MK2 Focus ST ST225 and MK2 Focus RS
    Vendor:
    Scorpion

    Scorpion 3" downpipe for MK2 Focus ST ST225 and MK2 Focus RS

    Regular price
    £279.99
    Sale price
    £279.99
    Regular price
  • Maxton Design Spoiler CAP Ford Focus ST Mk2 Facelift
    Vendor:
    MAXTON® DESIGN

    Maxton Design Spoiler CAP Ford Focus ST Mk2 Facelift

    Regular price
    £129.00
    Sale price
    £129.00
    Regular price
  • Cobra Sport Ford Focus ST 225 (Mk2) Cat Back Performance Exhaust
    Vendor:
    Cobra Sport

    Cobra Sport Ford Focus ST 225 (Mk2) Cat Back Performance Exhaust

    Regular price
    From £705.00
    Sale price
    From £705.00
    Regular price
  • Cobra Sport Ford Focus ST 225 (Mk2) Venom Box Delete Cat Back Race Tube Performance Exhaust
    Vendor:
    Cobra Sport

    Cobra Sport Ford Focus ST 225 (Mk2) Venom Box Delete Cat Back Race Tube Performance Exhaust

    Regular price
    From £780.00
    Sale price
    From £780.00
    Regular price
  • Genuine Ford rear wheel bearing for MK2 Focus including ST and RS
    Vendor:
    Genuine Ford

    Genuine Ford rear wheel bearing for MK2 Focus including ST and RS

    Regular price
    £249.99
    Sale price
    £249.99
    Regular price
  • MK2 Focus ST ST225 Lower Gearbox Mount Bracket Genuine Ford
    Vendor:
    Genuine Ford

    MK2 Focus ST ST225 Lower Gearbox Mount Bracket Genuine Ford

    Regular price
    £99.99
    Sale price
    £99.99
    Regular price
  • Maxton Design Rear Side Splitters Ford Focus Mk2 St Preface Model Fits With Rear Valance
    Vendor:
    MAXTON® DESIGN

    Maxton Design Rear Side Splitters Ford Focus Mk2 St Preface Model Fits With Rear Valance

    Regular price
    £79.00
    Sale price
    £79.00
    Regular price
  • Maxton Design Rear Side Splitters Ford Focus Mk2 St Preface Model
    Vendor:
    MAXTON® DESIGN

    Maxton Design Rear Side Splitters Ford Focus Mk2 St Preface Model

    Regular price
    £79.00
    Sale price
    £79.00
    Regular price
  • Maxton Design Rear Side Splitters V.1 Ford Focus Ii St Facelift
    Vendor:
    MAXTON® DESIGN

    Maxton Design Rear Side Splitters V.1 Ford Focus Ii St Facelift

    Regular price
    £79.00
    Sale price
    £79.00
    Regular price
  • MK2 Ford Focus ST ST225 & RS 2.5L Genuine Thermostat Housing
    Vendor:
    Genuine Ford

    MK2 Ford Focus ST ST225 & RS 2.5L Genuine Thermostat Housing

    Regular price
    £249.99
    Sale price
    £249.99
    Regular price
  • RTS Performance Front Brake Discs – MK2 Focus ST ST225 & Volvo C30/C70/S40/V50 – 320mm
    Vendor:
    RTS Performance

    RTS Performance Front Brake Discs – MK2 Focus ST ST225 & Volvo C30/C70/S40/V50 – 320mm

    Regular price
    £139.00
    Sale price
    £139.00
    Regular price
    £199.99
  • Airtec Motorsport Power Steering Tank for Focus Mk2 – With Sight Glass and Cap
    Vendor:
    AIRTEC Motorsport

    Airtec Motorsport Power Steering Tank for Focus Mk2 – With Sight Glass and Cap

    Regular price
    £153.10
    Sale price
    £153.10
    Regular price
  • Airtec Motorsport Remote Oil Cooler Adaptor Plate for MK2 MK2 Focus ST225 & Rs
    Vendor:
    AIRTEC Motorsport

    Airtec Motorsport Remote Oil Cooler Adaptor Plate for MK2 MK2 Focus ST225 & Rs

    Regular price
    From £133.95
    Sale price
    From £133.95
    Regular price
  • Airtec Motorsport Oil Breather Top Plate for Focus Mk2 St & Rs
    Vendor:
    AIRTEC Motorsport

    Airtec Motorsport Oil Breather Top Plate for Focus Mk2 St & Rs

    Regular price
    £167.45
    Sale price
    £167.45
    Regular price

Choosing upgrades for your Focus ST225

The best upgrades for your MK2 Focus ST225 depend on its current condition, intended use and power target.

For most tuned road cars, the priority is ensuring the vehicle is mechanically healthy before improving airflow and cooling with a suitable induction kit, intercooler and exhaust system.

The standard clutch can also become a limiting factor as torque increases, while suspension bushes and control arms are common wear points that can significantly affect how the car drives.

Our dedicated collections contain detailed recommendations for each upgrade category, including which products suit Stage 1, Stage 2, higher-powered and track-driven cars.

For complete staged tuning advice, read our Focus ST225 tuning guide.

Why buy Focus ST225 parts from Wayside Performance?

We supply parts that we regularly fit, test and tune on Focus ST225s. This allows us to recommend components based on real-world fitment, performance and drivability rather than relying solely on manufacturer descriptions.

Contact us if you need help choosing compatible parts or planning the next stage of your build.