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Big Brake Kit

XYZ Racing Hollow Front Brake Kit — Audi S4 B8 (4D/5D) (2008-2015)

SKU: XYZ-BRK-BKF-AU-022-A-FRONT

  • IncludesFront axle pair (2 discs + 2 calipers)
  • PositionFront
  • Disc Ø330–444 mm
  • Caliper pots6 / 8 / 12-pot
  • Lead time10–15 working days

Fits Audi S4 B8 (4D/5D) (2008-2015)

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£2,000.00Inc. VAT

Lead time: 10–15 working days from payment


£2,000.00

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 Front Brake Kit — Audi S4 B8 (4D/5D) (2008-2015) — 330 mm
330 mm

Carry 1,700 kg of quattro hardware into a hairpin at pace and the demands on your front axle become obvious. The B8 S4’s 3.0 TFSI supercharger builds torque from well below 2,000 rpm, which makes it genuinely fast on both circuit laps and long, fast A-roads, and that pace starts asking serious questions of the front brakes once the rotors begin saturating their heat budget.

The XYZ Racing front big brake kit for the Audi S4 B8 is built for exactly this vehicle: a heavy, fast AWD saloon or Avant that loads the front axle hard under deceleration. It fits as a matched pair of front calipers and two-piece floating discs across the front axle, with three pad compounds so the kit can be matched to how the car gets used, from daily commuting through fast-road weekends to full track sessions.

What this brake kit does for your 2008-2015 Audi S4 B8 (4D/5D)

The B8 S4’s longitudinally mounted engine sits ahead of the axle centre line, which means the front brakes absorb the majority of kinetic energy on every significant deceleration. The hollow-vane discs move heat out of the friction surface faster than the solid factory rotors, shifting the thermal saturation point upwards, which shows as more consistent pedal feel and shorter stopping distances during repeated hard stops. The two-piece floating construction lets the disc grow with temperature without warping the bell and trims rotating and unsprung mass off the front corners, and braided lines come as part of the kit to firm up the pedal.

Three pad compounds tune the kit to use. Street is the quiet, low-dust default with clean, predictable feel for everyday use. Sport sharpens initial bite without demanding pre-heated rotors. Racing opens up higher operating temperatures for circuit work where back-to-back braking zones would otherwise push a standard setup past its limits. The caliper finish gives the installation a deliberate, finished look through the wheels. Included painted colours are Red, Yellow, Gold, Black and Anodized Black at no extra cost.

About the front brake kit

This is XYZ Racing’s front brake upgrade for fast-road and track-day use, developed as a fitment-specific system rather than a universal package. The kit is supplied as a complete front-axle assembly covering both the four-door B8 S4 saloon and the five-door Avant estate, with its own calipers and two-piece floating discs and a choice of three pad compounds. The calipers are hollow-bodied as standard for strength without excess weight, with an optional Hollow Racing upgrade for full track use that drops the dust cover, is rated to 1000C and carries a two-year warranty.

Beyond the included painted finishes, a Custom Color in any Pantone is available, along with premium polished-forged Titanium, Polished Gold and Polished Silver and candy Teal, Blue, Red and Orange, so the finished installation reflects the owner’s specification rather than a default. Discs come drilled or slotted at the same price, and centre-bell upgrades, two-tone in five anodized colours or in titanium, are selectable at checkout. The kit sits with drivers who want meaningfully more braking capacity than the standard setup delivers, without moving to a full motorsport multi-piston caliper that demands dedicated track tyres to make sense on the road.

Fitment for the Audi S4 B8 (4D/5D) (2008-2015)

This kit is confirmed for the Audi S4 B8 in both four-door saloon and five-door Avant body styles, covering the full 2008-2015 production run. The B8 S4 ran the supercharged 3.0 TFSI V6 quattro drivetrain throughout this generation, in both body variants. Verify your front hub specification and wheel clearance against the kit’s dimensions before ordering.

What buyers also search for

  • Audi S4 B8 front brake upgrade for track days and sustained hard driving
  • B8 S4 big brake kit with the Racing pad compound option
  • Audi S4 B8 Avant brake upgrade to reduce front axle fade under load
  • XYZ Racing front brake kit for Audi S4 2008-2015
  • Audi S4 B8 brake caliper finishes, Red, Yellow, Gold, Black, Anodized Black

Pick your pad compound and caliper finish from the options above, and we build it to your spec.

What’s in the kit

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

  • 2×Two-piece floating discs — 330–444 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.

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 Audi S4 B8 (4D/5D) appear here as the rest of the range publishes.