Cognito's billet aluminum upper control arm kit improves front suspension geometry and adds camber/caster adjustability via FK 7/8 Heim joints, optimizing ball-joint angles through the full range of suspension travel — on and off-road.Precision-machined from 6061 aluminum, black anodized finish FK 7/8 Heim joints for camber & caster adjustability Optimized ball-joint angles through full suspension travel All hardware and instructions included