Brembo 66-89 911S/SC/Carrera Rear GT BBK 4 Piston Cast 2pc 309x28 1pc Rotor Drilled-Black

This Brembo GT Big Brake Kit for the rear of your 1966-1989 Porsche 911S, SC, or Carrera includes everything you need to significantly upgrade your braking system. You get a pair of Brembo 4-piston GT calipers, two 2-piece 309x28mm rotors that are drilled for heat dissipation, and all the necessary hardware to complete the installation. This kit is designed to replace your stock rear brake components with a more robust and capable setup, offering a notable improvement in stopping performance, especially under demanding conditions.

The calipers are constructed from cast aluminum, which is strong yet lightweight, helping to reduce unsprung weight. The 2-piece rotor design allows for better thermal management, as the aluminum hat can expand and contract independently of the iron friction surface, reducing the risk of rotor warping. These rotors are drilled, which helps to vent gases and heat away from the pad surface, maintaining consistent braking performance. The 309x28mm rotor size offers a larger swept area compared to stock, meaning more pad material is in contact with the rotor surface for increased braking force.

Installing a big brake kit like this is a substantial upgrade that can make a real difference in how your car feels and performs, particularly if you track your car or drive it hard. It's a well-built system from Brembo, a company known for its high-performance braking components. While this kit is designed as a direct replacement for the specified 911 models, it's always a good idea to refer to the manufacturer's installation guide for specific details on mounting and any potential modifications required for your particular vehicle.