XYZ Racing Hollow Rear Brake Kit — Bmw Z4 E89 35I (2009-2016)

The E89 Z4’s folding metal roof pushed kerb weight past 1,500kg, and on a circuit that mass lands hard on a rear axle already busy putting down the 35i’s turbocharged straight-six torque. The standard rear discs cope fine on the road, but lean on them through a sequence of heavy stops and the pedal starts to go long.

This XYZ Racing Hollow Rear Brake Kit for the Bmw Z4 E89 35I is a rear-axle upgrade built for owners who use the car the way the chassis allows, fast road and track days, rather than gentle boulevard miles. Supplied as a matched left-and-right pair, the hollow-vane discs shed heat the factory setup struggles to clear, keeping rear braking consistent when the back of the car is genuinely working.

What this big brake kit does for your 2009-2016 Bmw Z4 E89 35I

The first thing you feel is a firmer, more progressive rear pedal that holds its bite as the discs come up to temperature. On the E89 35i, where the rear axle carries the drive and a real share of the braking load, that consistency keeps the car settled under trail-braking instead of letting the tail go light at the wrong moment. Three pad compounds, Street, Sport and Racing, let you match the rear setup to how you actually use the car, from a quiet, low-dust road feel to a compound that tolerates repeated hard stops, and matching the rear compound to the front keeps the brake balance honest. The hollow-vane discs run cooler, which slows fade and protects the fluid from boiling on a long session, helped further by the braided lines in the kit. Painted caliper finishes come in Red, Yellow, Gold, Black or Anodized Black at no extra cost.

About the rear big brake kit

XYZ Racing builds this as a complete rear-axle package, calipers, two-piece floating discs and pads, designed to bolt to the E89 Z4’s rear hubs. The hollow-vane disc construction is the headline: coring material out of the braking ring trims rotating mass while opening extra routes for heat to escape, so the rear brakes recover faster between stops, and the floating bell lets the ring expand under heat without distorting. Three pad compounds ship with the kit. The Street compound suits owners who want durable, quiet, low-dust manners; the Sport compound steps up bite and heat tolerance for fast road and the odd track day; the Racing compound is aimed at track work where the rear brakes are leaned on through repeated sessions. 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. Calipers are painted in your choice of Red, Yellow, Gold, Black or Anodized Black, with premium polished-forged and candy finishes available, discs come drilled or slotted at the same price, and the centre bell can be upgraded to a two-tone anodized colour or titanium, so the upgrade reads as deliberate behind the wheels.

Fitment for the Bmw Z4 E89 35I (2009-2016)

This kit is cut for the E89-generation Z4 35i and covers the 2009 to 2016 model years. It is a rear-axle fitment matched to that chassis code, supplied as a left-and-right pair. Use the options above to confirm the spec against your exact car before ordering.

What buyers also search for

• Bmw Z4 E89 35i rear brake upgrade for fast road and track-day use
• Z4 E89 big brake kit with Street, Sport or Racing pad compounds
• Rear brake fade fix for the turbocharged Z4 35i on a circuit
• Hollow-vane disc rear brake kit for the 2009-2016 Bmw Z4
• Z4 E89 caliper colour options in Red, Yellow, Gold, Black, Anodized Black or custom

Set your pad compound and caliper colour, then build your rear brake kit when you order.