EBC BSD front rotors for 2001–2003 BMW 525i (E39) use a V-pattern slot design to improve heat dispersion and help pads run cooler versus OE-style rotors. British-made and precision machined, the BSD rotors combine thermally stable high-carbon castings with a silent slot pattern for a blend of performance and appearance. These vented rotors are offered to enhance braking on street-driven vehicles.
EBC 01-03 BMW 525i 2.5 (E39) BSD Front Rotors