Here, you can see the differences between the factory upper control arm and ReadyLift’s DOM steel tubular units. These heavy-duty control arms feature OEM-style ball joints installed to OEM geometry. That means you won’t have to modify anything to make the ball joints fit into the spindle. Also included are 90-degree grease fittings to insure the life of the new polyurethane bushings. These arms simply bolt in place of the factory units.