Brembo 87-91 928 S4/GT Rear GT BBK 4 Piston Cast 2pc 328x28 2pc Rotor Drilled-Black

Brembo is a name synonymous with high-performance braking systems, and this rear Big Brake Kit (BBK) for the 1987-1991 Porsche 928 S4 and GT models continues that tradition. If you're looking to significantly upgrade the stopping power and heat management of your 928's rear axle, this kit is designed to do just that. It replaces your factory rear brake components with a robust, multi-piston setup that can handle more demanding driving conditions.

This kit features a pair of 4-piston cast aluminum calipers, which offer more clamping force than typical 2-piston calipers. These calipers work with 328x28mm two-piece rotors. The two-piece design allows the rotor and hat to expand and contract independently, which can help reduce the risk of rotor warping under heavy use. The rotors themselves are drilled, which helps to dissipate heat and gasses more effectively than solid rotors, leading to more consistent braking performance, especially during repeated hard stops. The black finish on the calipers and rotors adds a clean, performance-oriented look to your rear wheel wells.

When installing a Big Brake Kit like this, it's important to ensure you have adequate clearance within your wheels for the larger calipers and rotors. It's also a good time to consider upgrading your brake fluid to a higher boiling point fluid to take full advantage of the kit's improved heat handling capabilities. This kit is a comprehensive solution for enhancing your Porsche 928's braking performance.