The EBC 08-11 Audi S4 BSD Front Rotors are designed to provide superior braking performance for your Audi S4. These rotors are made from a high-grade cast iron and feature a unique slotted and dimpled design that helps to improve brake pad bite and reduce brake fade. The rotors are also coated with a rust-resistant black zinc finish for a long-lasting, corrosion-resistant finish. With these rotors, you can expect improved braking performance and reliability for your Audi S4.