Big Brake Kit
XYZ Racing Hollow Front Brake Kit — Audi A4 B9 (2016-2026)
SKU: XYZ-BRK-BKF-AU-11-E-FRONT
- IncludesFront axle pair (2 discs + 2 calipers)
- PositionFront
- Disc Ø356–444 mm
- Caliper pots6 / 8 / 12-pot
- Lead time10–15 working days
Fits Audi A4 B9 (2016-2026)
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Caliper render for this kit:
The B9 A4’s MLB Evo architecture is a stiffer, more dynamically capable platform than the B8 it replaced, but that stiffness comes with a familiar front-weight bias: the longitudinally-mounted engine sits well ahead of the front axle, and the front discs carry the majority of the work in any serious stop. At road speeds that is manageable; push the car down a technical B-road or into a track session and the standard setup begins to announce its limits through a softening pedal and longer distances on subsequent braking zones.
This XYZ Racing front brake kit addresses that directly. It is a front-axle upgrade: a matched pair of left and right front calipers with two-piece floating, hollow-vane discs that improve heat rejection through the rotor, and three pad compounds so the specification can match the actual use of the car rather than being locked to a single compromise.
What this brake kit does for your 2016-2026 Audi A4 B9
The B9’s front axle is under disproportionate load the moment ABS intervenes, and the standard pads and rotors are factory-specced for comfort rather than sustained hard use. Hollow-vane discs run cooler under repeated heavy stops, which translates directly to a firmer, more consistent pedal feel when the brakes have been working, while the lighter two-piece construction trims rotating and unsprung mass at the front. Braided lines hold the pedal firm under load. The Sport compound gives owners using the A4 on fast roads a meaningful step over the OE pad without the cold-bite and dust penalty a track compound brings to daily use; for those taking the car to circuit days, the Racing compound is there to handle the load; Street is the quiet, low-dust road default. Calipers are hollow-bodied as standard, with a Hollow Racing upgrade for serious track use, rated to 1000C, no dust cover, two-year warranty.
About the Front Brake Kit
The hollow-vane two-piece disc is the foundation of this front upgrade. The internal vane geometry is shaped to maximise airflow through the disc during use, pulling heat away from the friction surface faster than a conventional solid or standard-vane rotor allows. That thermal management is the core difference between a brake that fades progressively over a session and one that holds its character from the first stop to the last. Three pad compounds cover the realistic spectrum of A4 B9 ownership: Street for owners who want improved bite over the OE setup without altering daily character; Sport for fast-road and occasional track use; Racing for circuit work where disc and pad run hot throughout. Discs come in drilled or slotted face at the same price, with optional two-tone centre bells in five anodized colours or titanium at checkout. Included caliper colours are Red, Yellow, Gold, Black and Anodized Black at no extra cost, with a Custom Color in any Pantone for £150 and premium polished-forged (Titanium, Polished Gold, Polished Silver) and candy finishes (Teal, Blue, Red, Orange) also available.
Fitment for the Audi A4 B9 (2016-2026)
This kit is specified for the Audi A4 B9 generation across its full 2016-2026 production span. The front fitment covers the MLB Evo platform in Saloon and Avant body styles. Confirm your existing front disc diameter and wheel clearance before ordering, as B9 quattro and FWD variants can leave the factory with different OE disc sizes depending on trim and engine specification.
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Select your pad compound, disc style and caliper colour when you order to build your spec.
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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More XYZ products for the Audi A4 B9 appear here as the rest of the range publishes.