These perfectly designed upper control arms are built to be used with the 3" suspension system and will allow for perfect alignment every time. The CALMINI arms are precision laser cut from 3/8" plate steel and will last longer than the life of the truck! These are the strongest and most durable arms available for your Frontier...accept no substitutes or imitations. The complete kit comes with the pair of upper control arms with integrated bump stop pads, eight(8) Vecton bushings, four(4) machined sleeves, and two(2) new upper ball joints with complete mounting hardware. These are the only arms to use if you wheel your rig.