We have bundled everything you need in a leveling kit for your F-150 4WD with high quality Cognito components.There is no guesswork. Cognito components are engineered, manufactured, and assembled in the USA. The Cognito 2.5 Inch Performance Uniball Leveling Kit includes the Cognito Uniball SM Series Upper Control Arm Kit, Elka 2.0 Reservoir Coilovers and rear shocksThe Cognito Uniball SM Series Upper Control Arms add style, function and performance to your vehicle by correcting the uniball angle for lifted and leveled applications and improving the allowable droop travel for a better ride quality.The Elka 2.5 shocks feature Dual Speed Compression adjustment and provide better attenuation of vibration, leading to major noise reduction in the cabin (much less squeak and rattle), damping characteristics optimized for each truck and setup, providing a smoother ride. Increased comfort in both on road and off-road conditions, especially over washboard and square-edge impacts, more stable and more predictable handling, reduced front-end diving when cornering or braking reduced rear-end bucking and lifting, and increased damping and spring rate for better handling when towing or loading truck.