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Big Brake Kit

XYZ Racing Hollow Rear Brake Kit — Bmw 4 SERIES F 83 M4 CONVERTIBLE (OE185) (2014-2020)

SKU: XYZ-BRK-BKR-BM-082-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 F 83 M4 CONVERTIBLE (OE185) (2014-2020)

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£3,200.00Inc. VAT

Lead time: 10–15 working days from payment


£3,200.00

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 F 83 M4 CONVERTIBLE (OE185) (2014-2020) — 380 mm
380 mm

The F83 M4 Convertible carries its folding hard top high and well aft of the rear axle line, and that mass has to be hauled down every time you touch the brakes. The XYZ Racing Hollow rear brake kit replaces the standard rear setup on the 2014-2020 BMW 4 Series F83 M4 Convertible with two-piece floating discs that shed rotational and unsprung weight while giving the rear axle more thermal headroom.

Rear braking on a powerful, rear-driven M car is as much about balance as outright stopping power. Sized as a big brake upgrade for the back axle, this kit is a pair of left and right rear calipers and matched discs that keep the rear of the car composed under heavy retardation, so the chassis stays settled rather than nervous when you lean on the pedal on corner entry.

What this brake kit does for your 2014-2020 BMW 4 Series F83 M4 Convertible

On the road you get a firmer, more progressive pedal and rear discs that recover heat faster between stops, worth having on a heavy convertible that asks a lot of its brakes down a fast B-road. Run the Street pad compound for quiet, low-dust everyday running, step up to Sport for harder fast-road work, or fit the Racing compound once you start booking track days and need the rear to hold temperature through repeated heavy braking. The two-piece disc design trims unsprung mass at each rear corner, which lets the dampers control less inertia. The result is a back end that feels tied down under braking and lets you trail the pedal deeper without the rear stepping out of line.

About the XYZ Racing Hollow brake kit

The kit pairs a pair of left and right rear calipers with two-piece floating discs, which remove material from the rotor to cut rotating mass without sacrificing swept area or thermal capacity. Less rotating inertia means quicker bite and an easier life for the driveline, while the retained disc face keeps a large heat sink for 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 three pad compounds, Street, Sport and Racing, so the same hardware suits a road car, a fast-road build or a car that sees regular circuit use. The included painted caliper finishes are Red, Yellow, Gold, Black and Anodized Black at no cost, with a Custom Color in any Pantone available so the look can match or contrast your wheels. Discs come drilled or slotted at the same price, with centre-bell upgrades selectable at checkout. As a rear-specific big brake kit, it is designed to form the back half of a balanced upgrade rather than overwhelm the front.

Fitment for the BMW 4 Series F83 M4 Convertible (2014-2020)

This kit is built for the F83-generation M4 Convertible (OE185 reference) across the full 2014 to 2020 production run. It mounts to the rear axle and is specified against the convertible bodyshell, not the F82 coupe or lesser 4 Series variants. Confirm your chassis code and build year before ordering.

What buyers also search for

  • BMW 4 Series F83 M4 Convertible rear brake upgrade for road and track use
  • F83 M4 Convertible rear big brake kit with Street, Sport or Racing pad options
  • BMW M4 Convertible two-piece disc rear brakes for reduced unsprung weight
  • 2014-2020 M4 Convertible rear brake caliper colour options including custom finishes

Choose your pad compound and caliper colour 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 — 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: 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.

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

Other products that fit this vehicle

Front & rear brake kits, coilovers and more for this car

  • More XYZ products for the Bmw 4 SERIES F 83 M4 CONVERTIBLE (OE185) appear here as the rest of the range publishes.