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Big Brake Kit

XYZ Racing Hollow Rear Brake Kit — Mercedes Benz S CLASS W221 S 450 (2005-2013)

SKU: XYZ-BRK-BKR-ME-065-REAR

  • IncludesRear axle pair (2 discs + 2 calipers)
  • PositionRear
  • Disc Ø380–421 mm
  • Caliper pots8-pot
  • Lead time10–15 working days

Fits Mercedes Benz S CLASS W221 S 450 (2005-2013)

Brake pad compound

Street: quiet, low-dust, strong cold bite for road driving. Sport: higher temperature range and more bite for fast road and occasional track. Racing: maximum fade resistance for sustained track use (noisier and dustier cold). Match the pad to how hard you actually brake.

Disc size

Caliper grade

Hollow is the standard caliper: a lighter hollow-body forged caliper with a dust cover and a 5-year warranty. Hollow Racing drops the dust cover for sustained high-temperature use (rated to 1000°C, 2-year warranty) — the track-grade choice.

Caliper colour

Painted colours are included. Polished-forged finishes are mirror-polished forged calipers (Titanium, Gold, Silver); candy colours are a deep, mirror-reflection paint. Both are premium upgrades — fuller detail further down the page.

Painted — includedTell us the exact Pantone (PMS) code you want the calipers painted.Polished forgedCandy
Disc style

Drilled discs (cross-drilled holes) vent gas and water and look aggressive; slotted discs (surface grooves) wipe the pad face clean and resist fade under sustained hard use. Same price — choose on looks or how you drive.

Centre bell

The centre bell is the CNC-machined aluminium hat that joins the disc to the hub. Standard anodized is included; a two-tone bell adds an anodized accent ring in your choice of colour; titanium is the lightest, forged option.

Carbon-ceramic rotor

Carbon-ceramic rotors are a special-order track upgrade: far lighter than steel, fade-resistant at extreme temperatures and extremely long-lived. The price follows the disc size you choose above. The standard two-piece steel rotor is included.

Configured price£3,200.00Inc. VAT

Lead time: 10–15 working days from payment


£3,200.00

Made to order. Full payment is taken at checkout. Production begins once payment is confirmed.

Pay by card, Apple Pay, Google Pay — or Klarna on eligible orders.

Caliper render for this kit:

XYZ Racing Hollow Rear Brake Kit — Mercedes Benz S CLASS W221 S 450 (2005-2013) — 380 mm
380 mm

The W221 S-Class is a near-two-tonne flagship, and the S 450’s V8 gives it the pace to match that mass, which is exactly the load the rear axle has to manage every time you wash off speed. This XYZ Racing Hollow Rear Brake Kit for the Mercedes Benz S Class W221 S 450 (2005-2013) swaps the standard rear setup for a larger, vented two-piece floating-disc package built to haul a heavy saloon down with less fade.

On a car this size, rear braking does more than shorten a stop. It settles the chassis and keeps the Airmatic-sprung body composed under hard deceleration. The kit is supplied ready for your choice of pad compound and caliper finish, so the spec follows how you actually use the car.

What this brake kit does for your 2005-2013 Mercedes Benz S Class W221 S 450

Fit the kit and the first thing you notice is pedal consistency: the larger rear discs and hollow vanes shed heat faster, so the bite on the first stop is the bite you still get after a run of hard ones. On a 2005-2013 Mercedes Benz S Class W221 S 450 that counts most on long motorway descents and repeated high-speed braking, where the standard rear setup can start to feel wooden. Three pad compounds let you tune bite and operating temperature to your use: Street for quiet daily refinement, Sport for harder fast-road work with more bite, and Racing for sustained high-temperature stops. More rear capacity also steadies the car under heavy braking, keeping the body flatter and the rear axle more planted, so a heavy flagship stops with authority rather than reluctance.

About the Hollow rear brake kit

The Hollow rear brake kit takes its name from its hollow-vane two-piece floating disc, which trims rotating weight and opens airflow through the rotor to pull heat out faster than a solid factory disc. It is a rear-axle big brake kit, a pair of rear discs and calipers sized for the W221’s mass rather than a generic fitment. Pad choice spans three compounds: Street for refined road use, Sport for a firmer everyday bite and wider heat range, and Racing for sustained high-temperature work, so the same hardware suits a pampered cruiser or a harder-driven S 450. 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 can be 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. Each part is matched to the rear geometry of the S 450, which keeps installation a bolt-on job and the front-to-rear brake balance correct.

Fitment for the Mercedes Benz S Class W221 S 450 (2005-2013)

This kit is built specifically for the W221-generation Mercedes Benz S Class in S 450 specification, covering the 2005 to 2013 model years, and mounts to the rear axle. Confirm your chassis code reads W221 and that the car is the S 450 variant before ordering, as brake hardware differs across the S-Class range.

What buyers also search for

  • W221 S 450 rear brake upgrade for confident high-speed motorway braking
  • Mercedes S Class W221 big brake kit with hollow-vane discs for reduced fade
  • S 450 rear brake kit pad options from refined road to Racing compound
  • W221 S-Class caliper colour choices in red, yellow, gold, black or Custom Pantone
  • Mercedes Benz S Class W221 S 450 rear brake kit that bolts on without modification

Choose your pad compound and caliper colour for the W221 S 450 from the options above when you order your rear brake kit.

What’s in the kit

Rear axle kit — supplied as a complete bolt-on assembly.

  • 2×Two-piece floating discs — 380–421 mm: you pick the exact diameter with the "Disc size" option
  • 2×Lightweight aluminium centre bells
  • 2×Forged aluminium calipers — 8-pot
  • 2×High-stiffness mounting brackets
  • 2×Braided stainless steel brake lines
  • 4×High-performance brake pads (1 set)
  • 1×Fitting hardware & tools pack

Parking brake: Retains your original (OE) handbrake.

Choosing your spec

Every kit is built to order around the choices you make above. Here is what each option actually changes, so you can spec yours with confidence.

Brake pads — Street, Sport or Racing

Every kit ships with a full set of high-performance pads; the compound is your call.

Street is the right default for fast-road driving — a strong, progressive cold bite with low noise, low dust and long disc life. Sport raises the working temperature and adds bite and fade resistance for hard road use and the occasional track day, while still behaving on a cold morning. Racing is a track compound built for sustained abuse: huge fade resistance and bite once heat is in it, at the cost of more noise and dust when cold. Match the pad to how hard you actually use the brakes — there is no benefit to a race pad that never gets up to temperature.

Caliper grade — Hollow vs Hollow Racing

Hollow is the standard caliper on every kit: a hollow-body forged caliper, lighter than a solid one, fitted with a dust cover and backed by a 5-year oil-leak warranty. For most fast-road and spirited track use it is all the caliper you need.

Hollow Racing is the track-grade upgrade. It runs the same hollow body but without a dust cover (so there is nothing to melt at sustained high temperature), uses a twin-metal piston that isolates heat travelling from the disc to the oil seal, and is rated to 1000°C. Available 330–356mm (rear). Warranty is 2 years on oil leaks and 10 years on appearance. Built for professional racing and repeated track days.

Hollow Racing caliper

Caliper colour & finish

Painted colours (Red, Yellow, Gold, Black, Anodized Black) are included at no cost. Want an exact match to your car? Custom Color (+£150) paints the calipers to any Pantone code you supply (15–20 day lead time).

Polished Forged finishes are the flagship: a forged caliper given a mirror-polished surface treatment that shifts colour with the viewing angle. Beyond the looks, the polished surface dissipates heat better, resists rust and stands up to the weather. Choose Titanium (neochrome, +£350), Polished Gold (+£300) or Polished Silver (+£250). They look their best paired with a titanium centre bell. Care: clean only with a dilute neutral cleaner or water.

Candy colours (+£200) use a deep candy-paint and polishing process for a mirror-reflection, boutique finish — pick Teal, Blue, Red or Orange (shown below right).

Polished forged caliper finishes
Candy caliper colours

Centre bells

The centre bell is the CNC-machined aluminium hat that joins the disc to the hub. The standard anodized centre bell is included. The Two-tone bell (+£200) adds an anodized accent ring — choose Red, Yellow, Orange, Purple or Silver right here at checkout. The Titanium centre bell (+£500) is a forged titanium bell (bolts not included) that finishes off the polished-forged look.

Two-tone anodized centre bells
Same car

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