We have bundled everything you need in a leveling kit for your F250/F350 4WD with high quality Cognito components and Fox 2.5" Reservoir Shocks. There is no guesswork.This Premier Leveling package is defined by the Fox 2.5" Factory Race Series shocks which feature a reservoir and DSC adjusters. The adjusters are easy to get to, even in the rear, as we have these shocks built with inverted reservoirs on the rear shocks to make the adjusters easier to get to when you want to crank some compression in for towing a heavy load.Make sure you choose a quality name brand tire with the appropriate load rating, and you will enjoy a ride quality with this Cognito Premier kit that is better than stock.