XYZ Racing Hollow Rear Brake Kit — Porsche 997 C4 (2006-2011)

The 997’s rear-engine layout hangs more static mass behind the back axle than almost anything else you’ll meet on a UK B-road, and that changes what the rear brakes are actually asked to do. On a Carrera 4, with drive fed to all four corners and a wider rear track than the two-wheel-drive cars, the back axle is genuinely loaded under braking rather than just along for the ride. The XYZ Racing Hollow Rear Brake Kit for the Porsche 997 C4 is built around that reality.

This is a rear big brake kit, fitted as a matched pair to the rear axle, aimed at owners running their 997 C4 hard on road and the occasional track day, where the standard steel rears start to feel soft after a handful of committed stops. A larger two-piece floating disc, a stiffer caliper and a choice of pad compound give the back axle the thermal headroom the chassis layout demands.

What this big brake kit does for your 2006-2011 Porsche 997 C4

The first thing you feel on the 997 C4 is a firmer, more consistent pedal under repeated heavy braking: the rears stop contributing to that long, sinking travel that creeps in once the factory discs are heat-soaked. The larger rear rotor adds swept area and thermal mass, so temperatures climb more slowly and shed faster between corners. The two-piece floating disc keeps rotating and unsprung mass in check, which the 911’s tail-heavy balance rewards – less inertia at the rear helps the car settle on turn-in – while the floating mount holds the rotor true under heat. With three pad compounds to choose from at build time, you can match friction to how the car is actually used, from quiet commuting through to sustained track running. The net result is a rear axle you can lean on harder, with stopping confidence that finally matches the front.

About the XYZ Racing Hollow Rear Brake Kit

The XYZ Racing Hollow Rear Brake Kit is a fixed-caliper rear upgrade designed specifically for the 997-generation 911. The disc is a two-piece floating item with hollow internal vanes, with material removed where it does no structural work to bring down rotating and unsprung mass at the back axle while keeping the swept area you need for heat. The kit pairs that disc with an upgraded caliper to raise clamping force and swept area over the standard rear setup, which is where the repeat-stop consistency comes from. Pad compound is a build-time decision: Street for road manners and lower dust, Sport for a firmer everyday bite, and Racing for the friction and fade resistance that hard track use needs. Disc faces are available drilled or slotted at the same price, and the centre bell can be specified two-tone anodized in five colours or in titanium. Calipers are finished in your choice of Red, Yellow, Gold, Black or Anodized Black at no extra cost, with a Pantone Custom Color for £150, so the kit can sit discreetly behind the wheel or stand out through the 997’s open spokes. For circuit-focused builds the optional Hollow Racing caliper drops the dust cover, is rated to 1000C and carries a two-year warranty. It is engineered as a rear-axle partner to a matched front kit, keeping front-to-rear brake balance honest.

Fitment for the Porsche 997 C4 (2006-2011)

This kit is a rear-axle application for the Porsche 997 C4 (Carrera 4) across the 2006 to 2011 model years, covering the all-wheel-drive variant of the 997 platform. It fits the rear only and is sized to suit the C4’s wider rear track. Confirm your exact build year before specifying pad compound and caliper colour.

What buyers also search for

• Porsche 997 C4 rear big brake kit for fast road and track day use
• 997 Carrera 4 rear brake upgrade with Racing, Sport and Street pad options
• XYZ Racing hollow rear brake kit for the all-wheel-drive 997 911
• Porsche 997 rear caliper colour choices including Red, Yellow, Gold and custom
• 997 C4 rear braking upgrade that resists fade on repeat stops

Specify your pad compound and caliper colour, then build your 997 C4 rear kit using the options above.