XYZ Racing Hollow Rear Brake Kit — Porsche 991 GT2 RS (2016-2019)

Hang most of a twin-turbo 3.8 flat-six behind the rear axle, give it the thick end of 690 PS, and the rear brakes of the Porsche 991 GT2 RS work far harder than the rear-engined layout might suggest. Under heavy trail braking the GT2 RS leans on its rear axle to stay settled, and rear-pad temperatures climb quickly once you start stringing corners together on track.

The XYZ Racing rear big brake kit for the Porsche 991 GT2 RS (2016-2019) is built around that reality. It is a rear-axle kit – a matched pair of left and right calipers and two uprated discs – that replaces the standard rear setup with a hollow-vane disc design and a choice of pad compounds chosen to absorb repeated heavy stops without the bite softening underneath you.

What this brake kit does for your 2016-2019 Porsche 991 GT2 RS

On a rear-engined car, the rear brakes shape how the GT2 RS turns in and how it settles on corner exit. A stronger, more consistent rear bite gives cleaner rotation as you load the front and a more stable platform when you pick the throttle back up out of slower corners. The three pad compounds let you match the car to the job: Street for quiet road use, Sport for fast-road and the occasional track day, and Racing for sustained circuit sessions where rear-disc heat is the limiting factor. The hollow-vane disc sheds that heat more readily than a solid equivalent, so pedal feel stays firm across a session rather than going long. Caliper colour is yours to set – Red, Yellow, Gold, Black or Anodized Black at no cost, with premium finishes available.

About the Hollow rear brake kit

The "Hollow" in the name points to the disc itself: a hollow-vane rotor designed to run lighter and cooler than a comparable solid item, trimming rotating mass at the rear axle while giving heat somewhere to escape during back-to-back stops. The rotors are two-piece floating discs run on braided lines, so the face stays flat and the pedal stays firm under heat. XYZ Racing pairs that disc with a three-step pad ladder – Street, Sport and Racing – so the same hardware suits a road-driven GT2 RS or one that spends its weekends on circuit. Calipers are hollow-bodied as standard, with an optional Hollow Racing upgrade (no dust cover, rated 1000C, two-year warranty) for the hardest track use. Painted finishes are included free in Red, Yellow, Gold, Black and Anodized Black; a Custom Color in any Pantone is +£150, with premium polished-forged Titanium, Polished Gold and Polished Silver and candy Teal, Blue, Red and Orange finishes available. Discs are drilled or slotted at the same price, with two-tone anodized or titanium centre bells selectable at checkout. This is a rear-axle-specific package for the 991 GT2 RS, sized for the chassis rather than adapted from a generic part. Move up through the pad compounds and the bite and high-temperature behaviour shift with them, letting you set rear braking to how and where the car is actually driven.

Fitment for the Porsche 991 GT2 RS (2016-2019)

This kit is engineered for the rear axle of the Porsche 991 GT2 RS across the 2016 to 2019 model years. It is a rear-position package, supplied with your selected pad compound and caliper colour. Confirm your build year from the options above before ordering so the correct rear fitment is matched to your car.

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Choose your pad compound and caliper finish for the Porsche 991 GT2 RS rear big brake kit from the options above and build yours.