These Corvette Wheel Bearing and Hub Assemblies are manufactured at state of the art ISO or TS16949 certified factories and go through rigorous inspections throughout all stages of manufacturing * Integral raceway design (GEN III) enhances product life, performance, and durability * OE fit, form, and function * Hub assemblies are tested for contaminate exclusion, vibration, run out, radial and axial force and load. The 1984-1985 Corvette used an additional seal that was placed in the rear spindle knuckle to keep dirt, grit, and water out and off of the bearing/seal assembly. You can install this seal, Corvette Central P#584157, in all C4 1984-1996 rear suspension spindle knuckles to keep the bearing and seals clean. The seal fits in the spindle knuckle and the yoke is machined in the same manner whether you have a 1984 or 1996 suspension assembly. There is less chance of water or dirt entering the area between the spindle bearing yoke splines and the bearings seal area. Size: N/ACorvette Central #: 584089Original GM #: 7466945Car years: 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996