Weld on double shear high steer arms are the best way to add crossover steering to a Superduty Ford ball joint Dana 60. This kit ties into the factory steering location and is welded to the cast steel knuckles. This kit requires welding, drilling, and is only compatible with Super Duty Ford ball joint Dana 60 axles made from 2005 to 2008. This kit requires a 17 inch wheel or larger, with 4.5 inches of backspacing or less. Constructed of 3/8" and 1/4" steel with two 1" grade 8 bolts.Double shear crossover steering.2" mounting width with a 3/4" bolt hole.Sold in pairs, heim joints, and steering knuckles are not included.