The EBC 04-10 BMW 525i E60 3.0L BSD Rear Rotors are a premium quality replacement rotor designed to fit the rear brakes on BMW 525i E60 3.0L models from 2004 to 2010. The rotors are made of high-grade cast iron for superior strength and durability. They feature EBC's patented BSD (Blended Slot Disc) design with curved slots for improved cooling and reduced brake noise. The rotors are machined to a tolerance of less than 0.01mm for maximum performance and are designed to provide superior braking performance in all conditions.