If you have the Currie 2 1/2" floater kit on a 4" tube rearend, this kit comes with the balance of the components needed to put 12.19" rotor Wilwood disc brakes with 4 piston Wilwood Superlight calipers on your rearend. Kit includes: a RH and a LH Wilwood 12.19" x 1.25" Ultralgiht rotors, RH and LH Wilwood 4 piston Superlight calipers with brake pads, weld on caliper brackets, and all necessary assembly hardware.