Wilwood 12.19-inch diameter rotor disc brake kit features drilled, slotted, plated and vented rotors, forged aluminum 4-piston calipers with pads, caliper mounting bracketry that is also the mounting for the internal drum style parking brake assembly, and your choice of wheel bolt pattern and wheel stud hole size. This kit will only fit the late model large bearing housing ends and axles with a 2.500" brake space offset.