Cognito Upper Control Arms are designed to help correct the upper balljoint angle on torsion key cranked or lifted applications. Available in uniball or balljoint style as well as with or without dual shock mounts. Balljoint upper control arms can also be used at stock height to eliminate factory press in balljoints which are prone to popping out of the factory arms. Includes bolt in balljoints or uniballs depending on the application you choose. Kit applications for 1500, 1500HD, 2500, 2500HD, 3500, 3500HD, Hummer H2 Cadillac (Escalade), Chevrolet Avalanche, Silverado, Tahoe), GMC (Sierra, Yukon) vehicles.