For use with OEM 2005 - 2012 F450/550 knuckles. Includes 5/16" thick 7075 aluminum caliper mounting brackets, aluminum brake hats that are drilled to accept 5/8" drive studs in dual bolt circles for the original 05+ F350 hub metric pattern [170mm (6.693") x 8-bolt] and 6-1/2" x 8-bolt, sold steel rotors with cleaning grooves, slot-drive rotor attachment system, all required mounting hardware, and MW 4-piston calipers with linings. Shims are included to fine-tune the alignment of the caliper to be centered with the disc. Installation - Service instructions can be found on Service Bulletin #0107.