
XYZ Racing Hollow Rear Brake Kit — Porsche BOXSTER 718 (2017-2026)
SKU: XYZ-BRK-BKR-PO-015-REAR
- IncludesRear axle pair (2 discs + 2 calipers)
- PositionRear
- Disc Ø330–421 mm
- Caliper pots6 / 8-pot
- Lead time10–15 working days
Fits Porsche BOXSTER 718 (2017-2026)
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Caliper render for this kit:

The 718 Boxster carries its mass behind the cabin, and that rearward bias means the back axle does more braking work than the layout of most front-engined coupes would suggest. The XYZ Racing Hollow Rear Brake Kit for the Porsche Boxster 718 targets exactly that, adding disc diameter and thermal capacity at the axle that loads hardest when you stand on the pedal from three-figure speeds.
It is built for owners who use the 718 the way Porsche intended, whether that is circuit sessions, hillclimbs or hard road. Fitted as a matched pair to the rear axle, a larger two-piece floating disc pairs with a fixed multi-piston caliper to hold pedal feel steady as heat builds, while the lightened rotor construction trims rotating mass so you gain stopping power without burdening the rear suspension with extra weight.
What this big brake kit does for your 2017-2026 Porsche Boxster 718
On a turbocharged 2.0 or 2.5-litre 718 that gathers pace fast between corners, the bigger rear discs give you more thermal headroom before the pedal goes long. Pick the Racing pad compound for repeat track laps, the Sport compound for fast-road bite, or the Street compound for quiet daily use, since the caliper accepts all three. The increased swept area sheds heat quicker, so fade arrives later in a session and the rear stays composed under trail-braking instead of stepping out. Caliper finishes in Red, Yellow, Gold, Black or Anodized Black come at no extra cost, with a Pantone Custom Color for £150, so the kit reads as a visual upgrade behind the wheels as well as a functional one.
About the Hollow Rear Brake Kit
The Hollow Rear Brake Kit is XYZ Racing’s rear-axle upgrade for drivers who have outgrown the standard 718 setup. The disc is a two-piece floating item with hollow internal vanes, which removes material to cut rotating and unsprung mass while keeping the friction surface large, and the floating mount lets the rotor expand under heat without distorting. A bigger disc diameter raises thermal capacity, and the fixed multi-piston caliper clamps more evenly than a sliding factory unit, sharpening response at the pedal. Three pad compounds cover the spread of use cases: Street for road, Sport for fast-road and the occasional track day, and a full Racing compound for repeated high-energy stops. Disc faces are offered drilled or slotted at the same price, with the centre bell available in a two-tone anodized finish across five colours or in titanium. The caliper ships in five included colours with a Custom Color and premium finishes alongside, and an optional Hollow Racing caliper – no dust cover, rated to 1000C, two-year warranty – is there for owners running serious track miles.
Fitment for the Porsche Boxster 718 (2017-2026)
This kit is built specifically for the Porsche Boxster 718, covering the 2017 to 2026 model years. It is a rear-axle fitment intended to run alongside the factory or an upgraded front setup. Confirm your model year and rear wheel clearance before ordering, as a rear big brake kit needs adequate caliper-to-barrel space.
What buyers also search for
- Porsche Boxster 718 rear brake upgrade for track days and fast road
- 718 Boxster big brake kit with Racing, Sport and Street pad options
- Porsche Boxster 718 rear caliper kit in Red, Yellow, Gold or Black
- Two-piece floating disc rear brake kit to cut rotating mass on a mid-engined 718
- 718 Boxster brake kit that holds pedal feel through repeated heavy stops
Choose your pad compound and caliper colour and build your 718 Boxster rear brake kit using the options above.
What’s in the kit
Rear axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 330–421 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: Retains your original (OE) handbrake.
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.

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