R1 Concepts CPDS10754 Premier Series Drilled And Slotted Rotors And Ceramic Pads Kit - Front and Rear Features: The Premier series are for those who want a high performance upgrade over their factory brakes. These rotors use a high carbon material which results in a stronger rotor that can handle more demanding driving styles and conditions. The Premium Series have a 50/50 center split castings to make the rotor stronger. These rotors also use a black electro-coating process that gives the rotor a two-tone color finish while protecting against rust.
