XYZ Racing Hollow Rear Brake Kit — Mercedes Benz S CLASS W221 S 63 AMG (2005-2013)

The W221 S 63 AMG carries the better part of two tonnes through every corner, and most of that mass settles onto the rear axle the moment you lift off a long motorway straight. This XYZ Racing Hollow Rear Brake Kit is built to keep that rear end composed when the standard discs have gone soft, giving the heaviest AMG saloon of its generation a back axle that bites cleanly instead of fading into the long-travel softness of its air-sprung chassis.

This is rear-specific hardware for the S 63, designed to balance a front end that already runs serious AMG calipers. Fit it alongside a front kit or use it to refresh a tired rear, and the 2005-2013 car regains the progressive, confident pedal a 500-plus-horsepower limousine needs.

What this brake kit does for your 2005-2013 Mercedes Benz S Class W221 S 63 AMG

On a car this heavy, rear braking is really about stability. Fresh, correctly sized rear discs stop the back axle from overwhelming the ABS under hard stops, so the S 63 stays straight and settled rather than squirming as the weight transfers forward. The hollow-vane disc design sheds heat and rotational mass, which counts on a saloon that asks its brakes to haul down repeated high-speed runs. Three pad compounds let you set the car up to match how you drive it: Street for quiet daily use, Sport for harder road work with more bite and heat range, and Racing when you want maximum bite from a warm rear axle. The result is a firmer, more reassuring pedal you can lean on without the vague middle stroke that creeps into a high-mileage W221.

About the Hollow Rear Brake Kit

The XYZ Racing Hollow Rear Brake Kit pairs a fixed caliper with a vented, two-piece floating disc whose hollow-vane structure runs cooler than the original-equipment rear setup. The hollow vanes cut rotational and unsprung weight while the venting keeps temperatures down during repeated stops, which is exactly what a two-tonne AMG saloon demands of its rear axle. Each kit, a pair of rear calipers and discs, can be specified with one of three friction compounds: Street as the quiet, low-dust default, Sport for more bite and a wider heat range, and Racing for harder, hotter work. The caliper body is hollow as standard, with an optional Hollow Racing upgrade for serious track use, rated to 1000C with no dust cover and a two-year warranty. Discs are drilled or slotted at the same price, with two-tone anodized or titanium centre bells selectable, and calipers come finished in no-cost Red, Yellow, Gold, Black or Anodized Black, premium polished-forged Titanium, Polished Gold or Polished Silver, candy Teal, Blue, Red or Orange, or a Custom Pantone for 150 pounds. It is a direct rear-axle upgrade, sized for the W221 platform rather than a universal kit forced to fit, and built to work with the car’s existing front braking and stability hardware.

Fitment for the Mercedes Benz S CLASS W221 S 63 AMG (2005-2013)

This kit is cut specifically for the W221-generation Mercedes Benz S Class in S 63 AMG trim, covering model years 2005 to 2013. It fits the rear axle only and is built around that chassis code, so you are matching hardware to the exact AMG variant rather than a generic S-Class fitment. Confirm your build year against the range above before you order.

What buyers also search for

• Mercedes Benz S Class W221 rear brake upgrade for a heavy AMG saloon that works its brakes hard.
• S 63 AMG rear big brake kit with Street, Sport and Racing pad compound options.
• W221 S 63 hollow-vane rear discs that shed heat on repeated high-speed stops.
• Mercedes Benz S 63 AMG brake caliper colours in red, yellow, gold, black or Custom Pantone.
• Direct rear-axle brake kit for the 2005-2013 S Class, sized for the chassis rather than a universal fit.

Choose your pad compound and caliper colour for the W221 S 63 AMG from the options above when you order your rear brake kit.