XYZ Racing Hollow Rear Brake Kit — Audi A4 B9 2WD (2016-2026)

The B9 A4 carries its longitudinal engine ahead of the front axle, and in 2WD form that leaves the rear doing comparatively little of the braking work, right up until you start using the car hard. The XYZ Racing Hollow Rear Brake Kit for the Audi A4 B9 2WD targets exactly that imbalance, giving the back axle the thermal headroom and bite it needs once you are stringing corners together on a fast B-road or a track day.

This is a rear-axle upgrade, not a styling exercise. It pairs a larger, two-piece floating disc with an uprated caliper and a choice of pad compound, so the rear stops fading behind the front and the car settles under heavy retardation rather than pitching forward. On a 2016-2026 A4 that sees genuine use, it restores the front-to-rear balance the standard setup gives away once everything is warm.

What this brake kit does for your 2016-2026 Audi A4 B9 2WD

The first thing you notice on a 2016-2026 Audi A4 B9 2WD is that the rear axle no longer runs out of brake before the fronts do. The larger two-piece floating disc sheds heat faster, so repeat stops from speed hold a firmer pedal instead of going long and soft. Bias shifts slightly rearward under load, which keeps the nose-heavy B9 from diving so sharply and lets you brake later into a corner with more confidence. Run the Racing compound and the rear bites hard enough to help rotate the car on trail-braking; the Street compound keeps things quiet and low-dust for the daily commute, with the Sport pad sitting between the two for harder road use. Selectable caliper colours, from the included painted finishes through to premium polished and candy options, let the kit suit the car rather than shout over it.

About the Hollow rear brake kit

The XYZ Racing rear big brake kit is built around an oversized two-piece floating disc designed to add cooling and thermal mass to an axle the factory specifies modestly on a front-driven A4. The caliper is hollow-bodied as standard to keep mass down, with an optional Hollow Racing build for sustained track use that removes the dust cover, is rated to 1000C and carries a two-year warranty. Three pad compounds are offered: Street for quiet, low-dust everyday driving, Sport for a sharper bite with controlled heat for fast-road use, and Racing for sustained heat where a road pad would glaze and fade. The caliper ships in included painted colours of 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 to match the wheel and brake setup. The intent is a rear axle that keeps pace with an upgraded front, not a cosmetic caliper cover: the greater swept area and vented disc are there to manage heat across repeated heavy stops.

Fitment for the Audi A4 B9 2WD (2016-2026)

This kit is cut for the B9-generation Audi A4 in 2WD form, covering the 2016 to 2026 model years. It is specified for the front-driven car specifically, so confirm your A4 is the 2WD version rather than quattro before ordering. Check wheel clearance against the disc and caliper dimensions before you order.

What buyers also search for

• Audi A4 B9 2WD rear brake upgrade for fast road and track use
• Audi A4 B9 2WD big brake kit with Street, Sport or Racing pad options
• Rear brake kit for the front-driven A4 that improves braking balance under load
• Selectable caliper colours for the Audi A4 B9 2WD across painted, polished and candy finishes
• Audi A4 B9 2WD rear brake kit that resists fade on repeat stops from speed

Pick your disc style, pad compound and caliper colour from the options above to build your rear brake kit.