The EBC 2002 Audi A4 3.0L BSD Front Rotors are high-performance brake rotors designed to provide superior braking performance for the Audi A4. The rotors are made from a high-quality steel alloy that is machined to exacting tolerances for a precise fit. The BSD (Brake Shudder Discontinuation) design reduces brake shudder and increases stopping power. The rotors are coated with EBC's patented black Geomet coating for improved corrosion resistance and improved performance. The rotors also feature EBC's patented dimple drilled pattern which helps to dissipate heat and reduce brake fade.