This kit comes complete ready to bolt on to your modified spindles that are milled for backing plate clearance, Iconic 45-fin "Buick" style brake drum brings back the old school look of the past, Drums are CNC machined to clear the included hubs making it a simple bolt on installation, 5 on 5.5" bolt pattern to match early Ford wheels, Backing plates come completely assembled with shoes, wheel cylinders, and brake hardware.