Complete with flange axles, steel spool, pro gears, 1350 series pinion yoke, choice of housing ends, steel end bells, 4-Link brackets, and rectangular tie bar, MW disc brakes with steel drilled rotors, and drive stud kit, any desired housing width, any width 4-Link centers. There are many items that can be interchanged to get your specific wheel to wheel width (from 33" to 36" and 38" to 42") and / or 4-link center dimension (18", 19", or 21"): Inner 4 link brackets, outer 4 link brackets, spacers, and end bells. To order, please collect your dimensions (4-link center, wheel-to-wheel, and bolt pattern), then call 1-866-508-6394 or contact us to place your order.Installation - Service instructions can be found on Service Bulletin #0056.