Compatible with vehicles originally equipped with cast steel control arms Only. The Cognito Ball Joint Sm Series Upper Control Arms add style, function, and performance to your vehicle by improving the allowable droop travel for a better ride quality. The boxed sheet metal arms are welded, and powder coated semi-gloss black. This control arm kit will add performance to the Chevy and GMC truck by correcting the ball joint angle for lifted and leveled applications. The allowable droop travel is also improved with the design of these arms. Made in the USA. Not compatible with 2007 Classic body style models (2007 Classic style compatible with 99-06 model components) Features and Benefits: Corrected ball joint angle Semi gloss black powder coating Made in the USA Applications: Cognito Ball Joint Sm Series Upper Control Arm Kit for 2007-2018 Silverado/Sierra 1500 2WD/4WD OEM Cast Steel