Big Brake Kit
XYZ Racing Hollow Front Brake Kit — Bmw 4 SERIES F 83 M4 CONVERTIBLE (2014-2020)
SKU: XYZ-BRK-BKF-BM-083-FRONT
- IncludesFront axle pair (2 discs + 2 calipers)
- PositionFront
- Disc Ø380–444 mm
- Caliper pots8 / 12-pot
- Lead time10–15 working days
Fits Bmw 4 SERIES F 83 M4 CONVERTIBLE (2014-2020)
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Caliper render for this kit:
The F83 M4 Convertible is substantially heavier than the F82 coupe; the folding soft-top mechanism and the additional torsional reinforcement BMW added to compensate for the absent roof translate into meaningfully higher front-axle braking demands. Under hard deceleration from the speeds the S55 twin-turbo straight-six encourages, that extra mass loads the front brake assembly in a way the standard M compound setup was never designed to handle repeatedly on track or across a demanding mountain road.
This XYZ Racing front brake kit is a single-axle upgrade built around the F83’s specific weight and power profile, a matched pair of front calipers and discs, available with three pad compounds and a full range of caliper finishes to match how the car is actually driven.
What this brake kit does for your 2014-2020 BMW 4 Series F83 M4 Convertible
Two-piece floating disc construction reduces rotating mass while preserving the swept area needed to manage the considerable front-axle loads the open-top M4 generates under hard braking. The aluminium centre bell lets the friction ring expand cleanly under heat without distorting, and hollow-vane internals draw air through the disc body. Cooler, more consistently performing discs deliver more predictable pad bite and shorter stopping distances, particularly relevant in a car whose extra structural mass puts a higher thermal burden on the front brake assembly than the lighter F82 coupe.
Three compounds let buyers calibrate the setup to actual use, from commuting through to circuit sessions where a road compound would overheat. Street is the quiet, low-dust default; Sport adds bite and heat range for fast-road work; Racing is the dedicated circuit compound. Caliper finish runs from understated to conspicuous, an unusually broad palette for a front-axle upgrade at this specification.
About the Hollow Front Brake Kit
The XYZ Racing caliper is built on a hollow body as standard, and the disc uses two-piece floating construction to cut rotating weight and improve heat dissipation compared with a conventional solid disc. For a front-engined, rear-wheel-drive convertible like the F83, where the extra structural reinforcement adds real kilograms over the coupe, that thermal management improvement is earned on every hard-braking event, not just at the extremes. The three-compound pad programme means the kit covers everything from daily driving through to track-prepared builds without a disc change; only the pad grade shifts.
Discs come drilled or slotted at the same price, and the centre bell can be specified two-tone in five anodized colours or in titanium. Caliper colour is painted at no cost in Red, Yellow, Gold, Black, or Anodized Black; Custom Color matches any Pantone for £150; and premium polished-forged (Titanium, Polished Gold, Polished Silver) and candy finishes (Candy Teal, Candy Blue, Candy Red, Candy Orange) take the look to show grade, leaving the visual impact entirely to the owner’s preference. The Hollow Racing caliper upgrade (no dust cover, rated 1000C, two-year warranty) and braided lines suit serious track use. The kit covers the front axle; it is there that the F83’s mass concentrates most heavily under braking.
Fitment for the BMW 4 Series F83 M4 Convertible (2014-2020)
This kit is confirmed for the BMW 4 Series F83 M4 Convertible across the full 2014-2020 production span. The F83 is the open-top body variant of the M4, distinct from the F82 coupe and F80 M3 saloon, with its own weight profile and structural specification. If your car carries non-standard braking or has been modified from factory specification, verify the chassis details before ordering.
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Select your pad compound, caliper colour, disc style, and centre bell from the options above to build your front-axle specification for the F83.
What’s in the kit
Front axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 380–444 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 8 / 12-pot
- 2×High-stiffness mounting brackets
- 2×Braided stainless steel brake lines
- 4×High-performance brake pads (1 set)
- 1×Fitting hardware & tools pack
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 286–380mm (front). 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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More XYZ products for the Bmw 4 SERIES F 83 M4 CONVERTIBLE appear here as the rest of the range publishes.