The leveling kit provides the required amount of level lift without causing compromises to the factory strut geometry and clearances with our new interlocking pre-load spacer for ease of installation. Considering the factory upper control arm's limited dynamic range when the AT4X/ZR2 truck is further lifted this leveling kit includes our popular tubular upper control arms with corrected ball joint cup angles heavy-duty replaceable ball joints and our new Terrain Control Technology (TCT) maintenance-free pivot bushings with side-biter washers to improve alignment retention.   Tire 33x11.50 on 20x9 0 offset wheel Max tire with trimming 295/60-20 20x9 0 offset wheel Features interlocking pre-load spacer for easy installation Includes DOM tube steel upper control arms with TCT maintenance-free pivot bushings. Retains factory turning radius. Includes ReadyGuard Powertrain Warranty. NOTES: Use of Auto 4 Hi feature not recommended.