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Big Brake Kit

XYZ Racing Hollow Rear Brake Kit — Audi S5 8.5T QUATTRO (TYPE I) (2013-2017)

SKU: XYZ-BRK-BKR-AU-09-F-REAR

  • IncludesRear axle pair (2 discs + 2 calipers)
  • PositionRear
  • Disc Ø380–421 mm
  • Caliper pots8-pot
  • Lead time10–15 working days

Fits Audi S5 8.5T QUATTRO (TYPE I) (2013-2017)

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£3,800.00Inc. VAT

Lead time: 10–15 working days from payment


£3,800.00

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 — Audi S5 8.5T QUATTRO (TYPE I) (2013-2017) — 380 mm
380 mm

The B8.5 S5 carries its supercharged 3.0 TFSI V6 longitudinally, ahead of the front axle, and that nose-led mass means the rear brakes spend most of their life as supporting cast, right up until you start hauling the car down from three-figure speeds on a circuit. The XYZ Racing Hollow Rear Big Brake Kit for the Audi S5 8.5T Quattro (type I) targets the back axle specifically: more thermal headroom, a firmer pedal, and braking balance that keeps the rears working with the fronts instead of fading out behind them.

This is a rear-axle kit, so it complements your front setup rather than replacing the whole system. The two-piece floating disc trims rotating mass at each rear corner, and the choice of Street, Sport or Racing pad compounds lets you match the rears to how the car is actually driven, from fast-road use to back-to-back track sessions.

What this brake kit does for your 2013-2017 Audi S5 8.5T Quattro (type I)

On a heavy AWD coupe like the B8.5 S5, the rear discs heat-soak faster than owners expect once the pace climbs. This kit adds the thermal capacity to cope, so the pedal stays consistent through repeated heavy stops. The Racing pad compound bites harder when you need rear stability into a corner, the Sport compound suits hard road and light track work, and the Street compound keeps things quiet and dust-light for daily driving. Braided lines hold the pedal firm under heat. Reduced rotating mass at the rear axle sharpens how the back of the car settles under braking, and the forged calipers are offered in Red, Yellow, Gold, Black or Anodized Black at no extra cost, or a custom Pantone finish to suit the build.

About the Hollow rear brake kit

The Hollow rear brake kit pairs a lightweight two-piece floating disc with a dedicated rear forged caliper, engineered to manage the heat a quattro S5 generates under hard deceleration. The caliper is hollow-bodied as standard. The disc cuts unsprung and rotating weight without giving up swept area, which helps both thermal stability and steering response. Three pad compounds, Street, Sport and Racing, cover the full spread from quiet road manners to circuit bite. The caliper ships in five included finish options, plus a custom Pantone shade, so the rear setup matches the rest of the car cosmetically as well as functionally. Braided lines are included, discs come drilled or slotted at the same price, and the centre bell can be upgraded to two-tone anodized in five colours or titanium.

Fitment for the Audi S5 8.5T Quattro (type I) (2013-2017)

This kit is built for the B8.5-generation Audi S5 8.5T Quattro (type I), covering the 2013 to 2017 model years. It is a rear-position fitment, a pair of rear calipers and discs, designed to bolt to the S5’s rear axle alongside the existing front brakes.

What buyers also search for

  • Audi S5 B8.5 rear big brake kit for track-day heat management
  • 2013-2017 S5 8.5T Quattro brake upgrade with Racing pad option
  • Audi S5 rear brake kit with coloured calipers for road and circuit use
  • B8.5 S5 two-piece floating disc brake kit to reduce rear rotating mass

Pick your pad compound and caliper colour and configure yours using 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: Electronic parking brake (EPB) compatible.

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 Audi S5 8.5T QUATTRO (TYPE I) appear here as the rest of the range publishes.