Big Brake Kit
XYZ Racing Hollow Front Brake Kit — Bmw 4 SERIES G23 (2WD/4WD) (2020-2026)
SKU: XYZ-BRK-BKF-BM-89-D-FRONT
- IncludesFront axle pair (2 discs + 2 calipers)
- PositionFront
- Disc Ø356–444 mm
- Caliper pots6 / 8 / 12-pot
- Lead time10–15 working days
Fits Bmw 4 SERIES G23 (2WD/4WD) (2020-2026)
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Caliper render for this kit:
The G23 is the heaviest body style in BMW’s 4 Series G2x family. The folding soft-top mechanism adds meaningful mass over the G22 coupe, and xDrive-equipped variants carry still more hardware through the front axle. That weight tells under braking: the standard front setup works proportionally harder to pull the G23 down from speed, and the gap between OEM performance and a properly specified upgrade is larger than it would be on the lighter coupe. The XYZ Racing front brake kit for the BMW 4 Series G23 is developed to close that gap. It is a single-axle upgrade, a matched pair of front calipers and discs.
Three pad compounds cover the spectrum of how a G23 is actually driven. A rear-wheel-drive 430i covering fast-road miles is a different braking proposition to an M440i xDrive on a track day, and the compound choice acknowledges that rather than forcing a single friction material across both use cases. A full range of caliper finishes completes the kit.
What this brake kit does for your 2020-2026 Bmw 4 Series G23
Upgraded front brakes on the G23 address the weight penalty the convertible body imposes on stopping distances and pedal feel. Two-piece floating disc construction improves heat dissipation compared to solid OEM discs, keeping pedal feedback consistent through repeated hard stops rather than allowing it to soften as thermal saturation approaches. The aluminium centre bell lets the friction ring expand cleanly under heat without distorting, and hollow-vane internals draw air through the disc body. A big brake kit’s larger swept area increases the friction surface in play, reducing the energy each unit area of pad and disc must absorb per stop, a practical advantage on xDrive models, where the all-wheel-drive acceleration makes the braking contrast with OEM hardware more pronounced.
The compounds let owners calibrate friction to actual use: Street is the quiet, low-dust default with the cold-bite suited to road driving; Sport adds bite and heat range for fast-road work; and Racing is built for sustained high-temperature operation where OEM pads would fade and leave the pedal feeling distant.
About the Hollow Front Brake Kit
The XYZ Racing caliper is built on a hollow body as standard, and the two-piece floating disc prioritises thermal management, supporting repeated braking cycles without the heat saturation that compromises standard cast-iron discs under sustained load. As a front-axle kit, it targets the end of the car that carries the weight during deceleration: the G23’s nose loads significantly in a hard stop, making the front calipers the primary heat generators in any demanding braking event. The big brake specification means a larger disc diameter than stock, extending swept area and distributing the work across more material.
Three pad compounds give owners a direct route to matching friction to use case: Street for daily driving, Sport for mixed use, Racing for track work. 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. The Hollow Racing caliper upgrade (no dust cover, rated 1000C, two-year warranty) and braided lines suit serious track use.
Fitment for the Bmw 4 Series G23 (2020-2026)
This kit is confirmed for the BMW 4 Series G23 convertible in both 2WD and xDrive (4WD) configurations, covering the 2020 to 2026 model years. Single-SKU coverage of rear- and all-wheel-drive variants reflects the shared front-axle architecture across G23 drivetrain options. Buyers with xDrive models should select their pad compound with the car’s all-wheel-drive weight distribution in mind when ordering.
What buyers also search for
- BMW 4 Series G23 front brake upgrade for road and track use on convertible models
- BMW G23 big brake kit covering both 2WD and xDrive variants from 2020
- BMW 4 Series G23 front caliper upgrade with Sport and Racing compound options
- BMW 4 Series G23 2020-2026 hollow-vane brake kit with custom caliper colour finish
Compound, caliper colour, disc style, and centre bell are all selected from the options above; build yours to suit how the car is used.
What’s in the kit
Front axle kit — supplied as a complete bolt-on assembly.
- 2×Two-piece floating discs — 356–444 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 6 / 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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