The Zone Offroad Adventure Series upper control arm box replaces factory upper control arms on 2020+ GM 2500/3500 HD trucks to improve strength and increase suspension droop travel. These fully assembled arms include a CNC-machined ball joint cup, greaseable ball joints with protective caps, OE-style rubber bushings and fully welded plate steel construction for a durable, ready-to-install upgrade.
Zone Offroad 2020+ GM 2500/3500 HD Upper Control Arm Box Kit