Brembo 08-13 135i (E81/E82/E88) Rear GT BBK 4 Piston Cast 345x28 2pc Rotor Slotted Type-1-Black

This Brembo GT Big Brake Kit for the rear of your 2008-2013 BMW 135i (E81/E82/E88) includes everything you need to significantly upgrade your braking system. You get a pair of 4-piston GT calipers, two 345x28mm two-piece slotted rotors, caliper mounting brackets, and all the necessary hardware for installation. This kit is designed to replace your factory rear brakes with a much more robust setup, offering improved stopping power and heat management.

The calipers are cast aluminum for a good balance of strength and weight, and they feature a 4-piston design. This means more clamping force can be applied to the rotor surface compared to your stock calipers. The rotors themselves are a two-piece design, with a 345mm diameter and 28mm thickness, providing a larger surface area for the pads to grip. They are slotted, which helps to sweep away dust and gas that can build up between the pad and rotor, maintaining consistent braking performance even under heavy use. The Type-1 slotting pattern is a popular choice for its effectiveness in clearing debris and its aggressive look.

Installing a big brake kit like this is a substantial upgrade, and it's often done when a vehicle is used for more demanding driving situations or when larger wheels are fitted. While this kit is designed as a direct bolt-on replacement for the rear axle, it's always a good idea to consult the manufacturer's installation guide for specific details and torque specifications. This Brembo kit represents a significant step up in braking capability for your 135i.