This truss system is designed for 4-link capability on a rear 14 Bolt axle. The boxed .250" plate provides maximum strength for the most hardcore wheelers. Truss is shipped unassembled and unwelded but is easy to assemble. ADD a welded differential cover with hardware for $126. Version with diff cover includes an indexable differential cover bridge that can trimmed to fit any pinion angle. Part # TRU-1203.