XYZ Racing Hollow Rear Brake Kit — Audi S3 4WD (1999-2003)

The 8L Audi S3 carries its weight over the nose, and its Haldex quattro system sends drive rearward only when the fronts start to slip, which means the standard rear axle does comparatively little of the stopping work and runs undersized discs to match. Lean on those small rear rotors through a series of hard stops and they heat-soak quickly, leaving the car feeling nose-heavy and reluctant to rotate on the brakes.

This XYZ Racing Hollow Rear Brake Kit for the Audi S3 4WD (1999-2003) adds rear thermal capacity and bite that the factory setup never had, restoring front-to-rear balance so the chassis settles instead of pushing wide. It is a rear-axle upgrade aimed at owners who use the car hard on fast road and track, where repeat braking exposes the standard rear brakes’ limits.

What this brake kit does for your 1999-2003 Audi S3 4WD

The most obvious change is consistency: larger, vented two-piece floating rotors shrug off the heat that fades the OEM rear discs after a few committed stops, so pedal feel stays firm rather than going long. Stronger, more progressive rear bite shifts braking effort away from the overworked front axle, which calms the 8L’s natural understeer and helps the car turn in under trail-braking. The kit is offered with Street, Sport and Racing pad compounds, so you can match friction level and operating temperature to how the car is actually used, from daily commute through weekend B-road to track session. Braided lines hold a firm pedal under load. Caliper finishes come in Red, Yellow, Gold, Black or Anodized Black at no extra cost, with a custom Pantone shade to suit the build.

About the Hollow Rear Brake Kit

XYZ Racing’s rear kit replaces the modest factory rear brakes with larger two-piece floating rotors and a forged caliper engineered to handle sustained heat without warping or fading. The disc’s hollow internal vanes target unsprung and rotational mass, keeping the rear of the car responsive while adding the swept area needed for genuine thermal headroom, and the caliper is hollow-bodied as standard. Three pad compounds, Street, Sport and Racing, let you tune the kit from road-friendly to circuit-spec, and the calipers are supplied ready to bolt to the S3’s rear hubs. 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. Construction is focused on the things that matter on a 4WD hatch worked hard: heat management, pad-to-rotor consistency, and a firm, repeatable pedal under load.

Fitment for the Audi S3 4WD (1999-2003)

This kit is specified for the 8L-generation Audi S3 4WD built from 1999 to 2003, covering both the early 210bhp and later 225bhp 1.8T quattro cars. It is a rear-axle kit, a pair of rear calipers and discs, and pairs naturally with a matching front upgrade for balanced braking front and rear. Confirm your exact production year before ordering.

What buyers also search for

• Audi S3 8L rear big brake kit for track day use
• Audi S3 4WD rear brake upgrade to cure rear disc heat-soak
• 1999-2003 Audi S3 rear brake kit with road and Racing pad compound options
• Audi S3 quattro rear caliper kit in Red, Yellow, Gold, Black, Anodized Black or custom Pantone
• Audi S3 brake balance upgrade to reduce front-end understeer

Choose your pad compound and caliper colour, then build yours using the options above when you order.