
XYZ Racing Hollow Rear Brake Kit — Bmw 4 SERIES G26 (2WD/4WD) (2020-2026)
SKU: XYZ-BRK-BKR-BM-89-C-REAR
- IncludesRear axle pair (2 discs + 2 calipers)
- PositionRear
- Disc Ø356–421 mm
- Caliper pots6 / 8-pot
- Lead time10–15 working days
Fits Bmw 4 SERIES G26 (2WD/4WD) (2020-2026)
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Caliper render for this kit:

The G26 Gran Coupe carries more mass over its rear axle than the two-door G22 it shares a platform with. The longer five-door liftback body, and the practicality bolted to it, all sits aft of the B-pillar. On a circuit or a quick B-road that rearward weight is exactly what loads the rear brakes hardest under trail-braking, and it is where the factory discs run short of thermal headroom first.
This XYZ Racing Hollow rear brake kit for the BMW 4 Series G26 (2020-2026) swaps those discs for larger, two-piece floating rotors that shed heat faster while cutting rotating mass where it costs least. With Street, Sport and Racing pad compounds on offer, you can match the rear axle to how hard you actually drive, from xDrive grip on a damp track day to sDrive balance on the road.
What this rear big brake kit does for your 2020-2026 BMW 4 Series G26
On the G26 the first thing you notice is a firmer, more repeatable pedal once the discs are up to temperature. Because the rear axle carries the Gran Coupe’s extra body weight, fade resistance there feeds straight into a calmer car under heavy braking, less of the nervous tail movement that creeps in when xDrive’s rear bias starts leaning on a tired standard disc. The two-piece floating disc construction trims unsprung and rotating mass, sharpening how quickly the rear wheels respond to the brake-by-wire blending the G26 leans on. Step up to the Racing compound and you get a pad that bites cleanly and holds its coefficient through repeat heavy stops, where the OE rear setup glazes and the pedal goes long; Sport covers fast-road and occasional track use, and Street keeps daily refinement and low dust. Caliper colour, from the included painted finishes of Red, Yellow, Gold, Black and Anodized Black, with a Custom Color in any Pantone available, is the cosmetic part of a change you will mostly feel through your foot.
About the Hollow rear brake kit
The Hollow rear brake kit is XYZ Racing’s rear-axle upgrade, a pair of left and right rear calipers built around a two-piece floating rotor, internally vaned to draw air through the disc and pull heat off the friction face faster than a solid factory rear disc. Lighter rotating mass at the rear hub is the whole point: less energy for the brake to manage, and a wheel that follows the road rather than fighting its own inertia. The caliper body is hollow as standard, with a Hollow Racing upgrade for serious track use, no dust cover, rated to 1000C and backed by a two-year warranty. The kit ships with a choice of three pad compounds, Street for quiet road use, Sport for hard road and occasional track work, and Racing for sustained circuit sessions, so the same hardware scales from a daily-driven Gran Coupe to a dedicated track car. Calipers are offered in the included painted finishes, with a Custom Color and premium polished-forged and candy options also available. Discs come drilled or slotted at the same price, with centre-bell upgrades selectable at checkout. Every part is specified for the rear of the G26, so disc and caliper geometry locate to the car’s existing rear mounting points.
Fitment for the BMW 4 Series G26 (2020-2026)
This kit is mapped to the G26 4 Series Gran Coupe in both rear-wheel-drive (sDrive) and all-wheel-drive (xDrive) form, across the 2020-2026 model years. It addresses the rear axle only. Confirm your exact build year and drivetrain so the rear disc and caliper spec match your car.
What buyers also search for
- BMW 4 Series G26 rear brake upgrade for road and track-day use
- Rear big brake kit for the G26 Gran Coupe in sDrive and xDrive
- BMW 4 Series G26 Racing brake pads that resist fade under repeat stops
- Two-piece rear rotors to cut rotating mass on the 4 Series G26
- Coloured brake calipers for the BMW 4 Series G26 (2020-2026)
Pick your pad compound and caliper colour for the 2020-2026 BMW 4 Series G26 from 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.

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