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Big Brake Kit

XYZ Racing Hollow Rear Brake Kit — Porsche 997 C4S (2006-2011)

SKU: XYZ-BRK-BKR-PO-009-REAR

  • IncludesRear axle pair (2 discs + 2 calipers)
  • PositionRear
  • Disc Ø330–421 mm
  • Caliper pots6 / 8-pot
  • Lead time10–15 working days

Fits Porsche 997 C4S (2006-2011)

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£2,200.00Inc. VAT

Lead time: 10–15 working days from payment


£2,200.00

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 — Porsche 997 C4S (2006-2011) — 330 mm
330 mm

Hang a flat-six behind the rear axle and the back brakes earn their keep. On the Porsche 997 C4S, that rearward mass means the rear discs shoulder a larger share of every stop than they would on a front-engined car, and on a circuit that share only grows as you trail the brakes deep towards an apex. The XYZ Racing rear big brake kit is built to carry that load on the wide-body C4S without the pedal going long.

This is the rear-axle half of the upgrade for the 2006-2011 Porsche 997 C4S, fitted as a matched pair: two-piece floating discs to shed rotating mass, clamped by a fixed caliper, with a choice of pad compound to suit how hard the car actually gets used. It is for owners who lean on the 997’s pace rather than admire it parked.

What this brake kit does for your 2006-2011 Porsche 997 C4S

The two-piece floating disc trims rotating and unsprung mass at each rear corner, so the brakes come up to working temperature quicker and the rear suspension has less inertia to control over kerbs and mid-corner bumps. The floating mount lets the rotor expand under heat without coning, holding its shape through a session. A rigid fixed caliper firms up pedal feel and holds it consistent as the discs heat, which is exactly what the rear of a rearward-biased 911 asks for under repeated heavy stops. Match the pad compound to your use and you get rear braking that stays predictable from a cold first lap through a full track session, with no drama on the road home.

About the hollow rear brake kit

The kit pairs two-piece floating discs with a fixed-mount caliper sized for the rear of the 997 C4S. Pad compound is your call: Street for everyday driving, Sport for harder fast-road use, and Racing for circuit work where outright bite and fade resistance matter more than cold feel. Disc faces come drilled or slotted at the same price, and the centre bell can be upgraded to a two-tone anodized finish in five colours or to titanium. Caliper finish is offered in Red, Yellow, Gold, Black or Anodized Black at no extra cost, with a Pantone Custom Color for £150, so the hardware behind the wheel suits the car. Premium polished-forged and candy finishes are available, and for hard track duty there is an optional Hollow Racing caliper – no dust cover, rated to 1000C, with a two-year warranty. The whole package is engineered to put more thermal headroom and a firmer pedal at the rear axle than the factory setup provides.

Fitment for the Porsche 997 C4S (2006-2011)

This rear brake kit is specified for the wide-body Porsche 997 C4S across the 2006 to 2011 model years, fitting the rear axle. Confirm your chassis and wheel clearance against the options above before ordering.

What buyers also search for

  • Porsche 997 C4S rear big brake kit for track day use
  • 997 C4S two-piece floating disc rear brake upgrade with reduced rotating mass
  • Porsche 997 Carrera 4S rear brake pads in Street, Sport or Racing compound
  • 997 C4S coloured caliper options for the rear axle
  • Porsche 997 C4S rear braking upgrade without losing road manners

Choose your pad compound and caliper colour, then build your spec using the options above.

What’s in the kit

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

  • 2×Two-piece floating discs — 330–421 mm: you pick the exact diameter with the "Disc size" option
  • 2×Lightweight aluminium centre bells
  • 2×Forged aluminium calipers — 6 / 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

Other products that fit this vehicle

Front & rear brake kits, coilovers and more for this car

  • More XYZ products for the Porsche 997 C4S appear here as the rest of the range publishes.