Know the landed cost before you order
Prices include VAT. UK delivery is £14.39, free when K&N and EBC items total £240 before checkout discount codes. Other brands do not count towards this threshold. International delivery is not yet available.
Give your Mk4 Focus ST more confidence under braking
Your Focus ST offers plenty to enjoy when the road opens up. A firmer, more responsive brake pedal makes the drive feel more complete. The EBC Apollo BBK020 upgrades the front with four-piston calipers and 355 mm fully floating discs for the listed Mk4 ST application, giving the brakes a proper place alongside your other performance upgrades.
Kit reference: BBK020. Exact SKUs for every available configuration are listed below.
Feel the difference in the components that matter
The reinforced aluminium caliper body resists flex under braking pressure, helping keep your inputs precise. The disc's floating friction ring can expand independently of its bell as it heats up, reducing thermal stress. You are investing in both pedal response and the hardware's ability to cope with repeated heat, with road and competition choices clearly separated.
Calipers made for the way you use your car
The road calipers are designed, manufactured and assembled in the UK from heat-treated, low-pressure cast aluminium. Their two-piece bodies use grade 12.9 bridge bolts, with hard-anodised aluminium pistons, stainless-steel bleed nipples and wear plates. The material and construction put substance behind the appearance of the upgrade.
External dust boots keep road dirt and debris away from the pistons, with high-temperature EPDM fluid seals behind them. A hard-anodised body gives corrosion protection beneath the high-temperature colour coating, while the single pad-retention bolt allows quick pad changes when servicing is due.
Choose your kit
This BBK020 offer uses 355 mm front discs and 4-piston calipers. Match the vehicle and original brake details below, then check the exact wheel-clearance template before selecting the caliper configuration.
Black, Blue, Red and Yellow are the painted road-caliper choices, with external dust boots and aluminium pistons. Choose the finish you want to see behind your wheels without changing the kit specification for that version.
Race competition is a different hardware and pad specification: hard-anodised calipers, stainless-steel castellated pistons and RP-X race pads. It is intended for dedicated track and race use, rather than chosen as another paint colour.
What is included
With the painted road configurations you receive:
- Two Apollo front calipers in the selected road colour
- Two fully floating two-piece front discs to the selected kit specification
- Front brake pads
- Stainless-steel braided brake lines
- Vehicle-specific mounting brackets and fitting hardware
- 1 litre of BF307+ Super DOT 4 brake fluid
The Race competition front brake assembly combines Apollo competition calipers, fully floating two-piece discs to the selected specification and RP-X race pads.
Technical specifications
| Specification | Details |
|---|---|
| Kit reference | BBK020; individual SKUs are listed in the option table |
| Supplied front discs | Version 1 - 355 mm, 4 piston |
| Disc construction | Fully floating, two-piece front discs |
| Front caliper piston count | 4 per caliper, according to the selected kit specification |
| Road caliper body | Heat-treated low-pressure cast aluminium; two-piece construction with grade 12.9 bridge bolts |
| Road caliper pistons | Hard-anodised aluminium with serrated/castellated noses |
| Road caliper seals | External dust boots and high-temperature EPDM fluid seals |
| Road caliper factory pressure test | 2,500 psi factory pressure test |
| Road caliper finish | Hard-anodised body with high-temperature colour coating; Black, Blue, Red or Yellow |
| Road caliper manufacture | Designed, manufactured and assembled in the UK |
| Road-kit brake lines | Stainless-steel braided brake lines |
| Road-kit fluid | 1 litre BF307+ Super DOT 4 |
| Road-kit mounting parts | Vehicle-specific brackets and fitting hardware |
| Race competition calipers | Hard-anodised finish with stainless-steel castellated pistons |
| Race competition pads | RP-X race compound |
| Race competition use | Dedicated track and race use |
| Wheel clearance | Check the exact kit template against the actual wheel, including spoke clearance |
Kit options and SKUs
| SKU | Kit specification | Caliper configuration |
|---|---|---|
| BBK020BLK-1 | Version 1 - 355 mm, 4 piston | Black |
| BBK020BLU-1 | Version 1 - 355 mm, 4 piston | Blue |
| BBK020R-1FR | Version 1 - 355 mm, 4 piston | Race competition |
| BBK020RED-1 | Version 1 - 355 mm, 4 piston | Red |
| BBK020YEL-1 | Version 1 - 355 mm, 4 piston | Yellow |
Tuning for your car
We also offer tuning services. Talk to us about tuning for your car and current setup. Tuning is quoted separately.
Vehicle fitment
Match your vehicle, engine, year and any brake-package notes in the table. Disc measurements in this fitment table describe the original brakes; the new kit dimensions are listed under Technical specifications and in the SKU table.
| Vehicle | Engine / model specification | Years | Fitting notes / original brake details |
|---|---|---|---|
| Ford Focus ST (MK4) | 2.3 Turbo Petrol · 280 bhp | 2019-2022 | Original front caliper: ATE Original front disc diameter (mm): 330 Original front disc height (mm): 51 Original front disc new thickness (mm): 27 |
Fitting and looking after your brakes
Have the kit fitted by a qualified brake specialist. The installation needs clean, sound mounting surfaces, the correct hardware and torques, proper bleeding, and clearance checks through steering and suspension movement. Dust-shield removal or modification can be part of fitting; keep any vehicle-specific instructions in the application table with the job.
The road kit is designed around the original master cylinder and rear brakes. If you have changed the master cylinder or rear brake arrangement separately, have your installer check compatibility and brake balance before ordering.
Follow the fitting instructions and the bedding procedure for the supplied pad compound before demanding full performance. When rear components are supplied, fit them as part of the intended brake upgrade. Inspect pad and disc condition regularly, especially during circuit use, and keep the hydraulic system in good condition.
Frequently asked questions
Which Focus ST is this kit for?
BBK020 is for the Mk4 Focus ST application in the fitment table. Match its engine, year and original brake details; Mk2 and Mk3 STs use different kit families.
How do I check wheel clearance?
Use the template for the exact kit version, printed at 100% scale, against the actual wheel. Wheel diameter alone does not establish spoke or caliper clearance. Send us your kit choice and wheel details if you need help arranging the check.
Why choose a floating disc?
The friction ring can expand independently of its mounting bell as it heats up. That reduces thermal stress during repeated braking and is one of the engineering differences behind a fully floating two-piece kit.
What changes when I choose Race competition?
You choose hard-anodised competition calipers, stainless-steel castellated pistons and RP-X race pads for dedicated circuit use. The painted road calipers use aluminium pistons and external dust boots. Use the exact SKU table to keep the chosen disc size and caliper configuration together.
What makes this different from changing pads and discs?
A big brake conversion includes new front calipers as well as the discs and pads. The reinforced Apollo calipers and fully floating two-piece discs change the front brake assembly itself, with the matching kit specification and fitting requirements shown above.
Want help choosing the right BBK020 configuration? Talk to us about your vehicle, wheels and how you use it, and we can help you choose the right brake upgrade.
Image shown is generic and may not reflect actual parts.
