
XYZ Racing Hollow Rear Brake Kit — Audi S5 8T 2WD (TYPE I) (2007-2012)
SKU: XYZ-BRK-BKR-AU-009-REAR
- IncludesRear axle pair (2 discs + 2 calipers)
- PositionRear
- Disc Ø356–421 mm
- Caliper pots6 / 8-pot
- Lead time10–15 working days
Fits Audi S5 8T 2WD (TYPE I) (2007-2012)
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Caliper render for this kit:

The B8 S5 carries its mass high and forward, and the factory rear brakes were never sized to carry their share of the work through repeat heat cycles. This XYZ Racing Hollow Rear Brake Kit for the Audi S5 8T 2WD (type I) targets that exact shortfall: a larger two-piece floating rear setup that sheds heat faster and resists the fade that creeps in once a fast B-road or a circuit session starts loading the rear axle.
It is built to partner a front upgrade rather than disguise a rear problem on its own. You choose Street, Sport or Racing pad compounds depending on how hard you lean on the car, then finish the calipers in one of five included colours, or a custom Pantone shade, to suit the build.
What this brake kit does for your 2007-2012 Audi S5 8T 2WD (type I)
On the 2007-2012 Audi S5 8T 2WD (type I), the rear axle does quieter work than the front, but it is where brake balance and stability under trail-braking are won or lost. A larger two-piece floating disc adds thermal mass and a faster route for heat to escape, so rear pedal feel stays consistent when you string corners together. Step up to the Racing compound and the rears bite harder under load, settling the car earlier on corner entry. The Sport pad suits hard road and light track work, while the Street pad keeps refinement and low dust if the S5 still sees commuting miles. Braided lines hold the pedal firm under heat. Either way you get firmer, more predictable retardation than the standard rear setup gives.
About the Hollow Rear Brake Kit
The Hollow Rear Brake Kit pairs an oversized two-piece floating disc with a forged caliper and a choice of three pad compounds. The disc is the defining feature: its hollow internal vanes remove mass from within the rotor to cut unsprung weight and open up internal cooling, holding disc temperatures down across a session, and the caliper is hollow-bodied as standard. Street, Sport and Racing compounds let you match the pad to the use case, from quiet road manners through to sustained track abuse. Calipers are available in Red, Yellow, Gold, Black or Anodized Black at no extra cost, with a custom Pantone finish, so the kit reads as intentional behind an open wheel. 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. As a rear-specific kit it is engineered to rebalance braking front and rear, not to handle every stop alone, so run it alongside a matched front kit for a coherent setup.
Fitment for the Audi S5 8T 2WD (type I) (2007-2012)
This kit is cut specifically for the Audi S5 8T 2WD (type I) built between 2007 and 2012, covering the B8-generation S5 across that span. It is a rear-axle fitment only, a pair of rear calipers and discs. Confirm your exact chassis and build year before ordering so the caliper and disc sizing match your car.
What buyers also search for
- Audi S5 8T rear big brake kit for combined road and track use
- S5 8T 2WD (type I) brake upgrade with Street, Sport or Racing pad options
- Audi S5 rear brake kit with five included caliper finishes plus custom Pantone
- B8 S5 rear braking upgrade to balance a matched front big brake kit
- Audi S5 8T two-piece floating rear discs for steadier heat management on track days
Pick your pad compound and caliper colour, confirm the fitment, and configure your S5 rear kit 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 — 356–421 mm: you pick the exact diameter with the "Disc size" option
- 2×Lightweight aluminium centre bells
- 2×Forged aluminium calipers — 6 / 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.

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.

Other products that fit this vehicle
Front & rear brake kits, coilovers and more for this car
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More XYZ products for the Audi S5 8T 2WD (TYPE I) appear here as the rest of the range publishes.