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Big Brake Kit

XYZ Racing Hollow Rear Brake Kit — Bmw 4 SERIES G82 M4 COUPE (2021-2026)

SKU: XYZ-BRK-BKR-BM-092-REAR

  • IncludesRear axle pair (2 discs + 2 calipers)
  • PositionRear
  • Disc Ø380–421 mm
  • Caliper pots8-pot
  • Lead time10–15 working days

Fits Bmw 4 SERIES G82 M4 COUPE (2021-2026)

Brake pad compound

Street: quiet, low-dust, strong cold bite for road driving. Sport: higher temperature range and more bite for fast road and occasional track. Racing: maximum fade resistance for sustained track use (noisier and dustier cold). Match the pad to how hard you actually brake.

Disc size

Caliper grade

Hollow is the standard caliper: a lighter hollow-body forged caliper with a dust cover and a 5-year warranty. Hollow Racing drops the dust cover for sustained high-temperature use (rated to 1000°C, 2-year warranty) — the track-grade choice.

Caliper colour

Painted colours are included. Polished-forged finishes are mirror-polished forged calipers (Titanium, Gold, Silver); candy colours are a deep, mirror-reflection paint. Both are premium upgrades — fuller detail further down the page.

Painted — includedTell us the exact Pantone (PMS) code you want the calipers painted.Polished forgedCandy
Disc style

Drilled discs (cross-drilled holes) vent gas and water and look aggressive; slotted discs (surface grooves) wipe the pad face clean and resist fade under sustained hard use. Same price — choose on looks or how you drive.

Centre bell

The centre bell is the CNC-machined aluminium hat that joins the disc to the hub. Standard anodized is included; a two-tone bell adds an anodized accent ring in your choice of colour; titanium is the lightest, forged option.

Carbon-ceramic rotor

Carbon-ceramic rotors are a special-order track upgrade: far lighter than steel, fade-resistant at extreme temperatures and extremely long-lived. The price follows the disc size you choose above. The standard two-piece steel rotor is included.

Configured price£3,800.00Inc. VAT

Lead time: 10–15 working days from payment


£3,800.00

Made to order. Full payment is taken at checkout. Production begins once payment is confirmed.

Pay by card, Apple Pay, Google Pay — or Klarna on eligible orders.

Caliper render for this kit:

XYZ Racing Hollow Rear Brake Kit — Bmw 4 SERIES G82 M4 COUPE (2021-2026) — 380 mm
380 mm

For repeated heavy stops in a G82 M4 Coupe, the rear axle does far more than most owners expect. This is a near 1.7-tonne car with the S58 twin-turbo straight-six pushing it hard down every straight, and on corner entry the rear brakes manage stability and load-transfer recovery while the front end is loaded up. Factory pads cope on the road, then start to go soft after a handful of committed laps.

The XYZ Racing Hollow Rear Brake Kit is built to keep the back axle of the G82 M4 Coupe working consistently when you are leaning on it. This is a pair of left and right rear calipers with matched two-piece floating discs that trim rotating and unsprung mass at the rear, and the kit ships with a choice of three pad compounds so you can match it to how the car is actually used.

What this brake kit does for your 2021-2026 BMW 4 Series G82 M4 Coupe

The most obvious gain is a pedal that stays where you put it. As the rear discs shed heat instead of soaking it, you get repeatable bite from the first stop to the last session of the day. Cutting rotating mass at the rear axle also sharpens how willingly the M4 rotates into a corner, since there is less inertia for the chassis to fight. The three-compound choice, Street, Sport and Racing, lets you set the rear bias to suit a daily car, a fast-road build, or a car that sees regular track time. The included painted caliper finishes, Red, Yellow, Gold, Black and Anodized Black at no cost, with a Custom Color in any Pantone available, mean the hardware looks the part behind an open wheel.

About the Hollow Rear Brake Kit

This is a rear-axle brake upgrade for the G82 M4, a pair of left and right rear calipers centred on two-piece floating discs that reduce mass without giving up thermal capacity. Less rotating weight at the rear helps both braking response and the way the chassis changes direction, while the disc design is aimed at shedding the heat that builds during back-to-back stops. 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 is offered with Street, Sport and Racing pad compounds, so the same hardware serves a road-biased setup or a harder track specification. The included painted caliper finishes run from Red and Yellow through to Gold, Black and Anodized Black, with a Custom Color in any Pantone available, letting the visual match the rest of the build. Discs come drilled or slotted at the same price, with centre-bell upgrades selectable at checkout.

Fitment for the BMW 4 Series G82 M4 Coupe (2021-2026)

This kit is specified for the rear axle of the BMW 4 Series G82 M4 Coupe across the 2021 to 2026 model years. It is a rear-position fitment, so pair it with the matching front kit if you are upgrading both ends. Confirm your chassis and model year against the listing before ordering.

What buyers also search for

  • BMW 4 Series G82 M4 Coupe rear brake upgrade for track and fast road
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  • Two-piece rear brake kit for the BMW M4 that resists fade on repeat stops
  • G82 M4 Coupe rear brake kit with custom caliper colour choices

Choose your pad compound and caliper colour from the options above to configure your G82 M4 rear brake kit.

What’s in the kit

Rear axle kit — supplied as a complete bolt-on assembly.

  • 2×Two-piece floating discs — 380–421 mm: you pick the exact diameter with the "Disc size" option
  • 2×Lightweight aluminium centre bells
  • 2×Forged aluminium calipers — 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.

Hollow Racing caliper

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).

Polished forged caliper finishes
Candy caliper colours

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.

Two-tone anodized centre bells
Same car

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