XYZ Racing Hollow Rear Brake Kit — Bmw Z4 E85 (2002-2008)

The Z4 E85’s short wheelbase and rear-biased balance make the roadster eager to rotate the moment you load the brakes into a corner. This XYZ Racing rear big brake kit for the Bmw Z4 E85 (2002-2008) gives the back axle the thermal headroom and pedal consistency to make that rotation something you can trust rather than something that catches you out, as a matched left-and-right pair.

It is built for the E85 owner who has moved past road pads and the standard discs, and who has felt the rear go vague after a few hard stops. This rear-specific kit pairs uprated two-piece discs with a stiffer caliper and a choice of pad compounds, addressing the half of the brake balance most owners leave stock until a hot afternoon at a circuit exposes it.

What this brake kit does for your 2002-2008 Bmw Z4 E85

On a car as light over the rear as the E85, the back brakes do less raw work than the fronts but heat-soak just as quickly under repeat stops. Larger two-piece discs with hollow vanes and a more rigid caliper lift that thermal ceiling, so the pedal stays firm through a full session instead of going long, and the lighter rotors trim rotating and unsprung mass at the back. The Street, Sport and Racing pad compounds let you match bite and operating temperature to how you actually drive, from a quiet, low-dust daily commute to back-to-back track laps. Stronger, more controllable rear braking also steadies the chassis on corner entry and softens the snap the short-wheelbase Z4 is known for when you trail-brake. With Red, Yellow, Gold, Black or Anodized Black caliper finishes at no extra cost, the upgrade reads through the wheel spokes as clearly as it is felt through the pedal.

About the Hollow rear brake kit

This is XYZ Racing’s rear-axle big brake upgrade for the first-generation Z4 roadster, sized to add braking capacity without unsettling how the car behaves on the road. The kit centres on a larger two-piece floating disc with a hollow-vane braking ring and an uprated caliper that clamps more evenly and resists flex under load, which is what keeps response consistent once the discs are hot, while the floating bell lets the ring expand under heat without distorting. Three pad compounds cover the spread from a quiet Street material, through a Sport compound for fast road and the odd track day, to a harder Racing compound that comes into its own at circuit temperatures. The caliper is hollow-bodied as standard, with a Hollow Racing upgrade for serious track use that removes the dust cover, is rated to 1000C and carries a two-year warranty. Painted calipers come in Red, Yellow, Gold, Black or Anodized Black, with premium polished-forged and candy finishes available, discs drilled or slotted at the same price, braided lines included, and a centre-bell upgrade in two-tone anodized colours or titanium, so it can suit the look of the build. Because this is a rear-only kit, it is intended to complement a front upgrade and keep the Z4 E85’s front-to-rear brake balance honest rather than overpowering the back axle.

Fitment for the Bmw Z4 E85 (2002-2008)

This kit is built for the E85 Z4 roadster across the full 2002 to 2008 production run, as a left-and-right pair. Confirm your exact variant and check wheel clearance when you configure, as the larger rear discs need adequate room behind the wheel. Caliper colour and pad compound are both chosen at the point of order.

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Choose your pad compound and caliper colour for your Z4 E85 and build your spec when you order.