Brembo 01-06 M3 Rear GT BBK 4 Piston Cast 345x28 2pc Rotor Slotted Type-1-Silver

This is the Brembo Rear GT Big Brake Kit for your 2001-2006 BMW M3. It's a comprehensive upgrade designed to significantly improve your M3's braking performance, especially under demanding conditions. The kit centers around a pair of robust 4-piston calipers and large 345x28mm two-piece rotors, engineered to handle the heat and stress of spirited driving and track use.

The calipers themselves are cast aluminum, which keeps weight down while maintaining the strength needed for consistent stopping power. Inside each caliper are four pistons, working together to apply even pressure across the brake pad surface. This means more controlled and powerful braking compared to the factory setup. The rotors are a two-piece design, with a cast iron friction ring bolted to an aluminum hat. This construction helps manage heat expansion and reduces the risk of rotor warping. They also feature a slotted surface, which helps to sweep away dust and gas that can build up between the pad and rotor, ensuring a cleaner, more consistent grip. The Type-1 silver finish on the calipers adds a clean, performance-oriented look to your wheels.

When installing a kit like this, you're looking at a significant upgrade over stock. It's designed to be a direct fit for the specified M3 models, meaning no custom fabrication is typically required. However, it's always a good idea to consult the manufacturer's installation guide for specific torque values and any recommended brake fluid types. This kit is a substantial investment in your M3's performance and safety, offering a noticeable improvement in braking feel and fade resistance.