When running oversized tires, an aftermarket steering stabilizer is highly recommended. Performance is improved over stock to minimize "bump steer" and front end vibration. This extends the lift of tires, tie rod and ball joints and other steering components. The Rough Country steering stabilizer cylinders are much beefier than stock with a chrome hardened 9/16" piston rod. Included is a steering stabilizer cylinder and mounting hardware. Shock boots are sold separately.