The EBC 06-07 BMW 325i E90 BSD Rear Rotors are a set of replacement brake rotors designed specifically for BMW 325i E90 models manufactured between 2006 and 2007. They feature EBC's patented BSD (Brake Surface Design) which helps to reduce brake fade and improve performance. The rotors are made from premium grade cast iron and feature a black E-Coating finish for maximum protection against corrosion and rust. They are designed to provide superior braking performance and increased longevity compared to OEM rotors.