This hub adapter is designed to replace the standard Gen-IV Camaro hub / bearing assembly with heavy duty tapered bearings. The adaptor flange bolts directly to the spindle upright. The hub remains in the stock location and utilizes the standard or after market brake rotors and calipers. Hub drilled for both stud sizes. Kit includes: Spindle Adapter, Hub, Studs, Races, Bearings, Seal, Axle Nut, Axle Washer and Dust Cap. Please specify 1/2" or 12mm studs.