
XYZ Racing Hollow Rear Brake Kit — Ford FOCUS ST MK4 WAGON(TYPE I) (2019-2026)
SKU: XYZ-BRK-BKR-FO-10-C-REAR
- IncludesRear axle pair (2 discs + 2 calipers)
- PositionRear
- Disc Ø356–421 mm
- Caliper pots6 / 8-pot
- Lead time10–15 working days
Fits Ford FOCUS ST MK4 WAGON(TYPE I) (2019-2026)
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Caliper render for this kit:

The Focus ST MK4 estate carries more mass behind the rear axle than the hatch, and under hard braking from the 2.3 EcoBoost’s torque that load has to be managed by hardware that was never sized for repeat heavy stops. On a front-driven car the front axle does the lion’s share of the work, but the wagon’s longer rear overhang and added cargo weight mean the back end heats and fades sooner than owners expect once the pace climbs.
This XYZ Racing rear big brake kit is built for the Focus ST MK4 Wagon(type I) to put proper thermal capacity and a firmer bite at the rear axle. It is the right pick for fast-road drivers who want a balanced pedal that does not go long after a series of motorway-speed stops, and for track-day owners running a heavier estate who need the rear to keep pulling its weight late in a session.
What this brake kit does for your 2019-2026 Ford Focus ST MK4 Wagon(type I)
After installation the most obvious change is brake balance: a larger rear assembly stops the front end carrying everything, so the car settles more squarely under trail-braking rather than nosediving and washing wide. Repeat-stop confidence improves because the bigger two-piece floating discs shed heat better, holding pedal feel through a string of hard applications instead of going soft. Three pad compounds let you match the rear to how the car is used: Street for quiet, low-dust commuting, Sport for fast-road work with the odd track day, and Racing for sustained circuit running. The reduction in rotating and unsprung mass also sharpens how the rear axle reacts over kerbs, and the caliper colour options look the part behind open-spoke wheels where the rear hardware is on full display.
About the Rear Big Brake Kit
This is a rear-axle-specific package for the MK4 Focus ST, supplied as a matched pair of uprated calipers and two-piece floating discs to replace the standard rear setup. The larger rotor face increases swept area and thermal mass while internal hollow vanes pull heat away from the friction surface, which is what keeps the rear working under sustained load rather than overheating and contributing to fade. Three pad compounds are offered: Street for quiet road use, Sport for harder fast-road and occasional track work, and Racing for circuit and high-temperature work. Discs come drilled or slotted at the same price. The hollow-body caliper is standard, with an optional Hollow Racing upgrade for serious track use that drops the dust cover, is rated to 1000C and carries a two-year warranty. Included painted finishes are Red, Yellow, Gold, Black and Anodized Black at no extra cost, with a custom Pantone colour at £150, plus premium polished-forged Titanium, Polished Gold and Polished Silver and candy Teal, Blue, Red and Orange. Fitting is rear-axle only, intended to complement a matched front kit for a fully rebalanced braking system.
Fitment for the Ford Focus ST MK4 Wagon(type I) (2019-2026)
This kit is specified for the Ford Focus ST MK4 Wagon(type I) across the 2019 to 2026 model years, fitting the rear axle as a pair. It is the wagon/estate-specific listing within the MK4 ST range. Confirm your build year and trim before ordering, and pair it with the matching front kit for balanced front-to-rear braking.
What buyers also search for
- Ford Focus ST MK4 estate rear brake upgrade for road and track use
- Focus ST MK4 Wagon big brake kit with Racing-compound pad option
- Rear brake kit for the 2.3 EcoBoost Focus ST that resists fade on track days
- Focus ST MK4 caliper colour options including Red, Yellow, Gold, Black and Anodized Black
- Uprated rear discs for the Focus ST estate without losing daily driveability
Set your pad compound and caliper finish using the options above when you order.
What’s in the kit
Rear axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 356–421 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 6 / 8-pot
- 2×High-stiffness mounting brackets
- 2×Braided stainless steel brake lines
- 4×High-performance brake pads (1 set)
- 1×Fitting hardware & tools pack
Parking brake: Electronic parking brake (EPB) compatible.
Choosing your spec
Every kit is built to order around the choices you make above. Here is what each option actually changes, so you can spec yours with confidence.
Brake pads — Street, Sport or Racing
Every kit ships with a full set of high-performance pads; the compound is your call.
Street is the right default for fast-road driving — a strong, progressive cold bite with low noise, low dust and long disc life. Sport raises the working temperature and adds bite and fade resistance for hard road use and the occasional track day, while still behaving on a cold morning. Racing is a track compound built for sustained abuse: huge fade resistance and bite once heat is in it, at the cost of more noise and dust when cold. Match the pad to how hard you actually use the brakes — there is no benefit to a race pad that never gets up to temperature.
Caliper grade — Hollow vs Hollow Racing
Hollow is the standard caliper on every kit: a hollow-body forged caliper, lighter than a solid one, fitted with a dust cover and backed by a 5-year oil-leak warranty. For most fast-road and spirited track use it is all the caliper you need.
Hollow Racing is the track-grade upgrade. It runs the same hollow body but without a dust cover (so there is nothing to melt at sustained high temperature), uses a twin-metal piston that isolates heat travelling from the disc to the oil seal, and is rated to 1000°C. Available 330–356mm (rear). Warranty is 2 years on oil leaks and 10 years on appearance. Built for professional racing and repeated track days.

Caliper colour & finish
Painted colours (Red, Yellow, Gold, Black, Anodized Black) are included at no cost. Want an exact match to your car? Custom Color (+£150) paints the calipers to any Pantone code you supply (15–20 day lead time).
Polished Forged finishes are the flagship: a forged caliper given a mirror-polished surface treatment that shifts colour with the viewing angle. Beyond the looks, the polished surface dissipates heat better, resists rust and stands up to the weather. Choose Titanium (neochrome, +£350), Polished Gold (+£300) or Polished Silver (+£250). They look their best paired with a titanium centre bell. Care: clean only with a dilute neutral cleaner or water.
Candy colours (+£200) use a deep candy-paint and polishing process for a mirror-reflection, boutique finish — pick Teal, Blue, Red or Orange (shown below right).


Centre bells
The centre bell is the CNC-machined aluminium hat that joins the disc to the hub. The standard anodized centre bell is included. The Two-tone bell (+£200) adds an anodized accent ring — choose Red, Yellow, Orange, Purple or Silver right here at checkout. The Titanium centre bell (+£500) is a forged titanium bell (bolts not included) that finishes off the polished-forged look.

Other products that fit this vehicle
Front & rear brake kits, coilovers and more for this car
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More XYZ products for the Ford FOCUS ST MK4 WAGON(TYPE I) appear here as the rest of the range publishes.