XYZ Racing Hollow Rear Brake Kit — Audi A5 (8W6) (2017-2026)

The 8W6 A5 Sportback carries most of its mass over the nose, and on the quattro cars the rear axle is asked to do real braking work to keep the back end settled as the front digs in. The factory rear discs are sized for road use and start to protest under repeat hard stops, which is exactly where the standard setup runs short. This XYZ Racing Hollow Rear Brake Kit for the Audi A5 (8W6) addresses that rear-axle shortfall directly.

Built as a rear-specific upgrade, the kit pairs a larger disc with a fixed caliper and a choice of pad compounds, so the rear bias can be matched to how the car is actually driven. For fast-road use or the occasional track day in a 2017-2026 A5, it gives the back axle the thermal headroom the standard hardware lacks.

What this rear big brake kit does for your 2017-2026 Audi A5 (8W6)

On the car, the first thing you feel is a firmer, more consistent pedal once the rear stops contributing fade to the equation. The larger rear disc and fixed caliper resist the heat soak that glazes the factory pads after a few hard stops down from motorway speeds. Three pad compounds let you set the rear bias deliberately: Street for a daily 8W6 that sees the odd B-road blast, Sport for harder road work with more heat range, and Racing for sustained circuit sessions where rear temperatures climb fastest. Stronger, more durable rear retardation also helps the quattro chassis rotate honestly into a corner instead of washing wide on the brakes.

About the Hollow rear brake kit

XYZ Racing supplies this as part of its Hollow brake line, a bolt-on big brake kit engineered specifically for the rear axle of the 8W6 A5 rather than a generic fitment forced to suit. The disc is a two-piece floating design that sheds heat and weight, and the caliper is hollow-bodied as standard to keep mass down, with an optional Hollow Racing build for hard track use that removes the dust cover, is rated to 1000C and carries a two-year warranty. Included painted caliper colours are Red, Yellow, Gold, Black and Anodized Black at no extra cost, with a Custom Color in any Pantone for £150, premium polished-forged finishes in Titanium, Polished Gold and Polished Silver, and candy finishes in Teal, Blue, Red and Orange, so it can be picked out behind an open wheel or kept discreet. Three pad compounds cover the spread from Street road duty, through a faster Sport pad, to a full Racing compound for circuit work. Because it is a position-specific rear kit, a matched pair of rear calipers and discs with braided lines, it is designed to work alongside the existing front brakes and the car’s ABS calibration rather than overwhelming the front-to-rear balance. The focus throughout is giving the rear axle more thermal capacity and a more durable friction surface than the standard A5 setup offers.

Fitment for the Audi A5 (8W6) (2017-2026)

This kit is cut for the 8W6 chassis A5, covering the 2017 to 2026 model years. The 8W6 code denotes the B9-generation A5 Sportback body, so confirm your car matches that chassis designation before ordering. It is a rear-axle fitment, supplied to complement the factory or an upgraded front brake setup.

What buyers also search for

• Audi A5 8W6 rear brake upgrade for fast road and occasional track use
• B9 A5 Sportback big brake kit that improves front-to-rear braking balance
• Audi A5 rear brake kit with a Racing pad compound for repeat hard stops
• 8W6 A5 selectable caliper colours across painted, polished and candy finishes

Pick your disc style, pad compound and caliper colour for the 8W6 A5 from the options above.