ICON Tubular Upper Control Arm Billet Cap SetICON Vehicle Dynamics tubular upper control arms do an exceptional job of adding strength and performance to your truck while also correcting suspension geometry and reducing OE balljoint bind in lifted applications. The 1" PTFE lined stainless steel uniball that can be found in ICON upper control arms is a high quality component, but its location on the vehicle leaves it vulnerable to all of the elements you may drive through including dirt, water,