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 rodMounts in factory stabilizer location.1 hourhttps://s3.amazonaws.com/roughcountry/install/82211.pdf2011-2015:4WD:Chevy:Silverado 2500 HD;2011-2015:4WD:Chevy:Silverado 3500 HD;2011-2015:4WD:GMC:Sierra 2500 HD;2011-2015:4WD:GMC:Sierra 3500 HD