Features: High-grade steel with ABE rotor construction . Special ground rotor surface finish counters vibrations and improves brake performance . Inner ring of floating brake discs is made of aluminum with an exclusive titanium color anodized finish . For use with all TRW compound brake pads . Sold each; must order two discs for dual-rotor applications . RAC BRAKE ROTORS . High-strength steel alloy to standard 35 HRC, hardened and tempered . Outstanding silhouette produced by high-performance laser cutting . Extremely low wear rate despite high brake performance . Design keeps brake pads from glazing and keeps brake pad wear rates low . Rotor pattern facilitates a uniform rise and fall in brake temperatures . RAC disc ensures a stable pressure point . Designed for use with sintered metal, carbon or organic compound brake pads . Suitable for street or track use . Sold each; must order two discs for dual-rotor applications. You need an fitting kit, please see the Info in the Image "Fitting Kit BMW".