The EBC 04-06 BMW X3 2.5 (E83) Premium Rear Rotors are a high-quality replacement for the factory rotors on BMW X3 2.5 (E83) vehicles. These rotors are made from a special cast iron that has been heat-treated for superior strength and durability. The rotors feature a directional curved vane design that helps to improve braking performance. They also feature a black zinc finish for superior corrosion resistance. The rotors are designed to be used with EBC's Greenstuff brake pads for maximum performance.