Cognito Motorsports SM Series Ball Joint Upper Control Arm Kit

A pair of boxed upper control arms that replace the factory front arms. They correct the suspension and ball-joint angles that get thrown out of range once you level or lift a truck.

why this one — This is a supporting part, not a lift on its own, so buy it alongside a leveling or lift kit rather than instead of one. It is one of the few parts here that Cognito lists as fitting AT4, AT4X, Trail Boss and ZR2, trims that most lift kits in this lineup exclude outright. Budget for an alignment afterward.