XYZ Racing Hollow Rear Brake Kit — Mercedes Benz GT43 AMG 4-Door Coupe (X290) (2018-2026)

The X290 GT43 carries close to two tonnes on a long wheelbase, and its rear axle earns its keep every time you lean on the brakes hard from three-figure speeds. The standard rear setup copes on the road, but stack up repeated heavy stops and the rears are the first place you feel heat creeping in and pedal feel softening. This XYZ Racing rear big brake kit for the Mercedes Benz GT43 AMG 4-Door Coupe (X290) targets exactly that: more thermal headroom and a firmer, more predictable rear axle under load.

It is a bolt-on rear big brake upgrade, supplied as a matched pair of rear calipers and rear discs, aimed at owners who use the car as it was built to be used: a fast GT that occasionally sees a track session or a spirited B-road. The two-piece floating disc trims rotating mass at the rear, and three pad compounds let you match the kit to how you actually drive.

What this brake kit does for your 2018-2026 Mercedes Benz GT43 AMG 4-Door Coupe (X290)

After fitting, the most noticeable change is consistency at the rear. The two-piece floating discs shed heat faster and add unsprung-weight savings, which steadies the GT43’s tail under trail-braking into a corner, useful on a heavy four-door that likes to settle its weight rearward as you brake. The Street compound gives quiet, dust-light stopping for daily use; the Sport compound adds bite and a wider heat range for fast roads; the Racing compound holds bite through a full session without the glazing the factory rears suffer. Pedal travel stays shorter and firmer as temperatures climb, so the car feels planted rather than nervous when you commit to a late stop, and front-and-rear balance stays where you want it. For a 360-plus-horsepower straight-six GT that gathers pace quickly, that recovered rear-axle confidence is what lets you carry speed without second-guessing the brakes.

About the rear big brake kit

The kit pairs a two-piece floating rear disc with a fixed multi-piston caliper, replacing the sliding-caliper rear arrangement on the X290. The lightened ring reduces rotating and unsprung mass at the rear hub, sharpening response and easing thermal load; it can be specified drilled or slotted at the same price. Three pad compounds are offered, Street, Sport and Racing, so the kit can be specified for road comfort, mixed road and track, or hard circuit duty. The caliper is hollow-bodied as standard, with a Hollow Racing upgrade (no dust cover, rated to 1000C, two-year warranty) for serious track use. Painted caliper colours come at no cost in Red, Yellow, Gold, Black or Anodized Black; a Custom Color in any Pantone is GBP 150, and premium polished-forged finishes (Titanium, Polished Gold, Polished Silver), candy finishes (Candy Teal, Candy Blue, Candy Red, Candy Orange) and two-tone or titanium centre bells are all available. Everything is sized as a direct rear fitment for the GT43, so the upgrade addresses the rear axle specifically rather than forcing a full four-corner change before you are ready.

Fitment for the Mercedes Benz GT43 AMG 4-Door Coupe (X290) (2018-2026)

This kit is built for the X290-chassis GT43 AMG 4-Door Coupe across the 2018 to 2026 model years. It is a rear-axle application, designed to bolt to the GT43’s standard rear hubs and carriers. Confirm your model year and chassis code against the listing before ordering, and choose your pad compound and caliper colour to match the spec you want.

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Pick your pad compound and caliper colour and configure your GT43 rear kit using the options above.