Brembo 08-13 135i (E81/E82/E88) Rear GT BBK 4 Piston Cast 345x28 2pc Rotor Drilled-Red

The 345x28mm two-piece rotors in this Brembo GT Big Brake Kit are cast iron, a material chosen for its excellent thermal properties and durability under heavy braking. This kit is specifically designed for the rear of your 2008-2013 BMW 135i, covering E81, E82, and E88 chassis codes, to significantly upgrade your braking system.

At the heart of this kit are the four-piston calipers, which offer increased clamping force over stock calipers. This means more consistent stopping power, especially during repeated hard braking events where heat can become a major factor. The two-piece rotor design, with its cast iron braking surface and aluminum hat, helps to reduce unsprung weight and allows for better heat dissipation, preventing brake fade. The drilled rotor faces are a functional choice, helping to vent gases and heat away from the pad surface, further improving performance and pad life under demanding conditions. This entire package is engineered to work together, providing a substantial improvement in both feel and performance for your 135i.

When installing a big brake kit like this, it's important to ensure you have the correct brake fluid with a high boiling point, such as DOT 4 or higher, to take full advantage of the system's capabilities. While this kit focuses on the rear, consider pairing it with a compatible front brake upgrade for a balanced braking system. Refer to the manufacturer's installation instructions for detailed guidance on proper fitment and setup.