The EBC 01-03 BMW 525i 2.5 (E39) Premium Front Rotors are designed to provide superior braking performance and durability. These rotors are made from high-grade cast iron and feature a special coating that helps to prevent corrosion and rust. They are designed to provide a smooth and consistent braking experience, and are ideal for high performance applications. These rotors are also designed to be compatible with a variety of brake pads.