The EBC 01-03 BMW 525i 2.5 (E39) GD Sport Front Rotors are a direct replacement for the original factory rotors. They are designed to provide superior braking performance and are made from a high-grade cast iron material. The rotors feature a unique curved vane design which helps to reduce heat build-up and improve performance. They are also finished with a corrosion-resistant black zinc coating for added durability. The rotors are designed to fit perfectly on the BMW 525i 2.5 (E39) model and are an ideal upgrade for those looking to improve their vehicle's braking performance.