Global West's Super Duty lower control arms feature spherical bearings on the frame side and new lower ball joints. Spherical bearings provide major improvements over standard rubber bushings or polyurethane. Bearings allow the suspension to move in it's intended path without bind or deflection. The tubular lower control arms are built from 0.125 wall seamless tubing, aircraft spherical bearings are utilized at bushing locations, lower ball joints are replaceable (Note: the ball joints thread into the lower control arm. This design is used heavily in the stock car industry), and stock strut rods will bolt up or Global West's Adjustable Strut Rods can be used. The kit includes the ball joints and associated hardware.