Rigid billet steel hub directly replaces the OEM cast iron hub found on mid ‘70’s Camaro and GM mid-size applications fitted with 11" diameter x 1.00" thick rotors. Hub features 5 x 4-3/4" bolt circle and is fitted with 5/8"-11 coarse thread studs. Bearings, rotor, grease seals, spindle nut, and dust cap must be purchased separately.