We have bundled everything you need in a leveling kit for your F250/F350 4WD with high quality Cognito components and Fox shocks. There is no guesswork.The 2.0 Performance Series IFP smooth body shocks contain the latest in shock technology to transform the performance of your truck or SUV. They use our race-proven damping control to provide a comfortable on-road ride and predictable off-road handling in even the toughest conditions. Made in the USA.