The EBC 97-00 BMW 540i 4.4 (E39) USR Slotted Front Rotors are designed to provide superior braking performance for the BMW 540i 4.4. These rotors feature a unique slot pattern that helps to improve cooling and reduce brake fade under heavy loads. The slots also help to reduce brake dust build-up and extend rotor life. The rotors are constructed from a high-grade cast iron for superior strength and durability. They are also coated with a corrosion-resistant zinc plating for added protection against the elements.