Take your Silverado/Sierra 1500 to new heights with this 4.5 Inch lift kit from Zone Offroad. Kits include everything needed from high strength crossmembers and steering knuckles to strut spacers and rear block kit to level out the stance. Get the look, performance, and capability your truck deserves with clearance for up to 33 Inch tires. Quick Specs: Front Lift Height 4.5 Inch Rear Lift Height 4 Inch Front Lift Method Strut Spacers Rear Lift Method Cast Blocks Lift Type Lift Kit Wheel Size 17 x 9 Back Spacing 5 Inch Max Tire Size 33 x 12.5 Wheel Size 2 18 x 9 Back Spacing 2 5 Inch Max Tire Size 2 33 x 12.5 Finish Powdercoat Cutting Required Yes Accommodates Factory Wheels See Notes Welding Required No In The Box: All Necessary Mounting / Installation Hardware Crossmembers CV Axle Spacers Differential Drop Brackets Rear Lift Block & U-Bolt Kit Skid Plate Steering Knuckles Features: Corrects suspension, steering, and driveline geometry for great on-road handling and improved off-road performance. FMVSS No.126 compliant to work with your vehicle's stability & traction control systems without lighting up your dash like a Christmas tree. Heavy-duty differential skid slate improves offroad protection. High-strength, 1/4 Inch steel construction crossmembers correct lower control arm geometry. High-strength, CNC machined, replacement steering knuckles improve strength while correcting steering angles. Multi-point differential relocation brackets secure front differential for improved CV operating angles. Proudly made in the USA. Rear lift block and longer U-bolts for easy installation and level stance. Weld-in frame support plate for additional strength.