We have selected all the parts you'll need to lift your Silverado/Sierra 2500/3500 2WD/4WD 4 Inches with high quality Cognito components and Fox performance shocks. At the core of this lift package is our performance proven Cognito Front Suspension Lift Kit featuring an integrated skid plate that ties the front and rear cross members together for unmatched front-end rigidity. The kit includes custom fabricated spindles and all bracketry required for installation as well as 1 inch fabricated rear blocks and new U Bolts for the rear. These parts are hand built here in the USA and finished with a durable semi-gloss black powder coating. The Fox 2.0 Performance Series Monotube Shocks are perfectly matched to give a comfortable on-road ride and predictable off-road handling in even the toughest of conditions. Made in the USA. Each Kit Features Yields 4-inches of front lift Cognito Block and U-Bolt Kit yields 1-inch of rear lift Fox 2.0 Performance Series Monotube Front Shocks Fox 2.0 Performance Series Monotube Rear Shocks Allows for up to a 33x12.5 Tire on a 9-inch Wide Wheel with -12mm Offset and 5-Inch backspacing Cognito Decal Pack