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

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
  • MK2 Focus RS 3 Piece Clutch Kit - Upgrade for MK2 Focus ST225
    Vendor:
    LUK

    MK2 Focus RS 3 Piece Clutch Kit - Upgrade for MK2 Focus ST225

    Regular price
    £349.00
    Sale price
    £349.00
    Regular price
  • MK2 Focus ST ST225 Bosch Front Lambda Sensor Pre cat
    Vendor:
    Bosch

    MK2 Focus ST ST225 Bosch Front Lambda Sensor Pre cat

    Regular price
    £129.99
    Sale price
    £129.99
    Regular price
  • MK2 Focus ST ST225 & RS Genuine Ford Waterpump
    Vendor:
    Genuine Ford

    MK2 Focus ST ST225 & RS Genuine Ford Waterpump

    Regular price
    £99.99
    Sale price
    £99.99
    Regular price
  • Airtec Motorsport Lightweight Aluminium Header Tank for Focus Mk2 St/rs
    Vendor:
    AIRTEC Motorsport

    Airtec Motorsport Lightweight Aluminium Header Tank for Focus Mk2 St/rs

    Regular price
    From £241.16
    Sale price
    From £241.16
    Regular price
  • Airtec Motorsport Complete Oil Breather Kit for Focus Mk2 St & Rs
    Vendor:
    AIRTEC Motorsport

    Airtec Motorsport Complete Oil Breather Kit for Focus Mk2 St & Rs

    Regular price
    £502.55
    Sale price
    £502.55
    Regular price
  • Airtec Motorsport Focus Mk2 St and Rs De-cat
    Vendor:
    AIRTEC Motorsport

    Airtec Motorsport Focus Mk2 St and Rs De-cat

    Regular price
    From £147.00
    Sale price
    From £147.00
    Regular price
  • Rear wheel bearing for MK2 Focus ST ST225
    Vendor:
    Genuine Ford

    Rear wheel bearing for MK2 Focus ST ST225

    Regular price
    £129.99
    Sale price
    £129.99
    Regular price
  • MK2 Focus ST & RS Hardrace drivers side uprated engine mount
    Vendor:
    Hardrace

    MK2 Focus ST & RS Hardrace drivers side uprated engine mount

    Regular price
    £229.00
    Sale price
    £229.00
    Regular price
  • Maxton Design Front Racing Splitter Ford Focus II ST Preface Model
    Vendor:
    MAXTON® DESIGN

    Maxton Design Front Racing Splitter Ford Focus II ST Preface Model

    Regular price
    £149.00
    Sale price
    £149.00
    Regular price
  • Air-Con Delete Kit For MK2 MK2 Focus ST225 & RS And Volvo C30/S40/V50 T5
    Vendor:
    AIRTEC Motorsport

    Air-Con Delete Kit For MK2 MK2 Focus ST225 & RS And Volvo C30/S40/V50 T5

    Regular price
    £395.00
    Sale price
    £395.00
    Regular price
  • Bosch 750cc Injectors Focus RS MK2 & Focus ST ST225
    Vendor:
    AIRTEC Motorsport

    Bosch 750cc Injectors Focus RS MK2 & Focus ST ST225

    Regular price
    £643.19
    Sale price
    £643.19
    Regular price
  • MK2 Focus ST ST225 Rear Brake Pads Genuine Ford
    Vendor:
    Genuine Ford

    MK2 Focus ST ST225 Rear Brake Pads Genuine Ford

    Regular price
    £54.99
    Sale price
    £54.99
    Regular price
  • Maxton Design Side Skirts Diffusers Ford Focus II ST Facelift
    Vendor:
    MAXTON® DESIGN

    Maxton Design Side Skirts Diffusers Ford Focus II ST Facelift

    Regular price
    £174.00
    Sale price
    £174.00
    Regular price
  • Maxton Design Rear Side Splitters V.2 Ford Focus II ST Facelift
    Vendor:
    MAXTON® DESIGN

    Maxton Design Rear Side Splitters V.2 Ford Focus II ST Facelift

    Regular price
    £79.00
    Sale price
    £79.00
    Regular price
  • Cobra Sport Ford Focus ST 225 (Mk2) Front Pipe Sports Cat / De-Cat Performance Exhaust
    Vendor:
    Cobra Sport

    Cobra Sport Ford Focus ST 225 (Mk2) Front Pipe Sports Cat / De-Cat Performance Exhaust

    Regular price
    From £208.00
    Sale price
    From £208.00
    Regular price
  • MK2 Focus ST ST225 Front ABS Sensor
    Vendor:
    Wayside Performance

    MK2 Focus ST ST225 Front ABS Sensor

    Regular price
    £39.99
    Sale price
    £39.99
    Regular price
  • MK2 Focus ST & RS Scorpion 200CEL 3" Sports Cat
    Vendor:
    Scorpion

    MK2 Focus ST & RS Scorpion 200CEL 3" Sports Cat

    Regular price
    £499.99
    Sale price
    £499.99
    Regular price
    £517.09
  • MK2 Focus ST ST225 Genuine Ford front anti-roll bar drop link
    Vendor:
    Genuine Ford

    MK2 Focus ST ST225 Genuine Ford front anti-roll bar drop link

    Regular price
    £69.99
    Sale price
    £69.99
    Regular price
  • MK2 Focus ST ST225 Genuine Ford rear drop link
    Vendor:
    Genuine Ford

    MK2 Focus ST ST225 Genuine Ford rear drop link

    Regular price
    £79.99
    Sale price
    £79.99
    Regular price
  • Maxton Design Rear Valance Extension Ford Focus Mk2 St (Preface)
    Vendor:
    MAXTON® DESIGN

    Maxton Design Rear Valance Extension Ford Focus Mk2 St (Preface)

    Regular price
    £59.00
    Sale price
    £59.00
    Regular price
  • Maxton Design Front Splitter Ford Focus Ii St Preface Model (Ver. 2)
    Vendor:
    MAXTON® DESIGN

    Maxton Design Front Splitter Ford Focus Ii St Preface Model (Ver. 2)

    Regular price
    £174.00
    Sale price
    £174.00
    Regular price
  • Airtec Motorsport 3.5 Inch Downpipe for MK2 MK2 Focus ST225 & Rs
    Vendor:
    AIRTEC Motorsport

    Airtec Motorsport 3.5 Inch Downpipe for MK2 MK2 Focus ST225 & Rs

    Regular price
    £359.00
    Sale price
    £359.00
    Regular price
  • MK2 Focus ST ST225 SuperPro Front and Rear Anti-Roll Bar Upgrade Kit
    Vendor:
    SuperPro

    MK2 Focus ST ST225 SuperPro Front and Rear Anti-Roll Bar Upgrade Kit

    Regular price
    £675.68
    Sale price
    £675.68
    Regular price
  • MK2 Focus RS 3pc Clutch Kit Genuine Ford
    Vendor:
    Genuine Ford

    MK2 Focus RS 3pc Clutch Kit Genuine Ford

    Regular price
    £249.00
    Sale price
    £249.00
    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.