No it is actually a normal 14 bolt out of a 90's chevy. It utilizes c&c hubs to bring the width down to 63.5 inches. I used a bracket I cut off a dana 60u I was using for another project, and welded it on the 14 bolt as the tubes were the same size. This allowed me to bolt on the caliper bracket and in hat parking break off of the dana 60u. 3/4 ton dodges from the early 2000's used the same breaks, but the rotor was deeper so I used that in order to get a slip on rotor. This allows easier maintenance as all the disk break kits put the rotor on the back of the hub meaning you have to take apart the hub when you do breaks. It also gave me a reliable parking break, and massive dual piston calipers.