Steering stabilizers are designed to restrain "bump steer" and front end vibration, giving added life to tires, ball joints, and other steering components.Easy bolt-on installation. Improves control and handling. Reduces bump steer. Reduces tie rod and ball joint wear and tear. Chrome hardened 18mm piston rodThis stabilizer kit is a stacked mount design. One stabilizer on top of the other.1-2 hourshttps://s3.amazonaws.com/roughcountry/install/82219.pdf1977-1979:4WD:Ford:Bronco;1977-1979:4WD:Ford:F-100;1977-1979:4WD:Ford:F-150