Tiltons 7.25inches OT-II cerametallic racing clutches are primarily designed for racing applications where some clutch modulation is desired. These are suited to 4-paddle discs that incorporate a unique blend of ceramic and metallic materials. Cerametallic discs are thicker than sintered metallic discs and they provide higher heat capacity through their increased mass. In addition the engagement characteristics of cerametallic clutches are smoother than sintered metallic clutches. These features make Tiltons 7.25inches OT-II cerametallic racing clutches popular in most applictaions