The EBC 11+ BMW Z4 3.0 Twin Turbo iS (E89) Premium Rear Rotors are a high-performance upgrade for your BMW Z4. These rotors are made from a unique 11+ material that is extremely durable and offers superior performance compared to standard rotors. The rotors feature a curved vane design that helps to reduce brake noise and increase cooling, while also providing superior braking performance. The rotors also come with a special coating that helps to protect the rotors from corrosion and rust. These rotors are designed to provide maximum performance and reliability while keeping your BMW Z4 running at its best.