
XYZ Racing Hollow Rear Brake Kit — Bmw 7 SERIES G 12 (2015-2026)
SKU: XYZ-BRK-BKR-BM-63-D-REAR
- IncludesRear axle pair (2 discs + 2 calipers)
- PositionRear
- Disc Ø356–421 mm
- Caliper pots6 / 8-pot
- Lead time10–15 working days
Fits Bmw 7 SERIES G 12 (2015-2026)
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Caliper render for this kit:

The G12-generation 7 Series carries more car behind its rear axle than almost anything else BMW builds, and on a long-wheelbase saloon nudging two tonnes the rear brakes spend their life managing weight transfer rather than headline stopping power. The XYZ Racing Hollow Rear Brake Kit for the Bmw 7 Series G 12 attacks that problem at the back axle, where a heavy luxury saloon most needs help shedding heat on repeated stops.
This is a rear-axle upgrade built around a hollow-vane, weight-saving two-piece disc and a fixed big-brake caliper, sized for a car that asks a lot of its brakes on motorway descents and quick A-road work. It is the rear half of a balanced setup for owners running anything from a 730d to a 750i who want the back of the car to pull its weight under hard retardation.
What this rear brake kit does for your 2015-2026 Bmw 7 Series G 12
Fit the kit and the first thing you notice is a firmer, more confident rear under braking, with less of the soft, settle-back feel that comes from a factory rear setup on a heavy saloon. The hollow-vane disc strips rotating and unsprung mass from each rear corner, which sharpens how quickly the back axle responds and eases the load on the air-sprung rear suspension, while the two-piece floating build keeps each disc true as it heats. With Street, Sport and Racing pad compounds available, you can match bite and heat range to how you actually use the car, from quiet, low-dust commuting to spirited cross-country runs. Bigger, better-cooled rear discs hold their bite through repeated stops, so a long descent with passengers and luggage aboard no longer cooks the rear brakes into a spongy pedal. The result is a 7 Series that stops squarer and stays planted instead of pitching hard onto its nose.
About the Hollow Rear Brake Kit
The Hollow Rear Brake Kit is XYZ Racing’s rear big-brake package, named for the hollow-vane disc design that removes mass from the centre of each disc without surrendering swept area. Lighter discs mean less rotating weight for the rear axle to spin up and slow down, and the internal venting gives heat somewhere to go on a car as heavy as the G12. The kit pairs a matched left-and-right pair of two-piece discs with a fixed big-brake caliper, braided lines and a choice of three pad compounds: Street for everyday, low-dust driving, Sport for harder fast-road use and a wider heat range, and Racing for track and high-load work. The caliper is a hollow-body unit as standard, with an optional Hollow Racing version rated to 1000C and a two-year warranty for serious circuit use. Included painted finishes are Red, Yellow, Gold, Black and Anodized Black at no extra cost, with a Custom Color in any Pantone and premium polished-forged and candy options above that, so the upgrade reads as cleanly through the rear wheels as it performs. Discs come drilled or slotted at the same price, and two-tone anodized or titanium centre bells are selectable. It is engineered as a matched rear-axle component rather than a generic disc swap, which is why fitment is tied to the specific chassis it is listed against.
Fitment for the Bmw 7 Series G 12 (2015-2026)
This kit is listed for the long-wheelbase G12 7 Series across the 2015 to 2026 model years, covering the rear axle specifically. It is sold as a rear-position big brake kit, so pair it with a matching front setup if you want balanced bias front to rear. Confirm your exact chassis code and build year against the listing before ordering so the caliper and disc dimensions line up with your car.
What buyers also search for
- Bmw 7 Series G 12 rear big brake kit for a heavier luxury saloon
- G12 7 Series hollow-vane disc upgrade that resists fade on long motorway descents
- 7 Series rear brake kit with Street, Sport and Racing pad compound options
- Bmw 7 Series G 12 caliper colour choices including red, gold, black and custom
- Rear-axle braking upgrade for the 2015-2026 Bmw 7 Series
Choose your pad compound and caliper colour using the options above to build your G12 rear brake kit.
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.

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