NEW IN OPEN BOX. Applications Fit for Chevy Silverado 1500 / for. [Load Leveling Capacity] Up to 5,000 pounds, provide a comfort ride. [Benefits of Air Spring] With internal Jounce Bumper, preventing air spring suspension kit from being completely compacted in the impact caused by heavy objects, potholes, curbs, or objects on the road. (Install Notes) This is a complete air suspension kit, includes everything needed for installing. Installation manual is available to download on the product page or you can contact our customer service to send it.