Cognito ball joint style boxed sheet metal upper control arm Kit for 2001-2010 Chevrolet and GMC 1500HD / 2500 / 2500HD / 3500 / 3500HD 2WD / 4WD trucks, Chevy and GMC 2001-2013 2500 2WD / 4WD SUVs and Hummer H2, H2 SUTs. Made in the USA specifically for leveled and lifted applications where an upgrade is desired to provide better performance, style, and function. The boxed sheet metal arms are CNC robot welded and powder coated semi gloss black. Cognito alloy series ball joints are included as well as new crush sleeves and polyurethane bushings. Ample droop travel is required for good ride quality and all suspension components to last and work properly.