Skyjacker Heavy-Duty Add-a-Leaf Springs offer you a big selection of front and rear Add-a-Leafs designed to add extra lift or restore the lift you lost from added vehicle weight. The Heavy-Duty Add-a-Leaf Springs are made from American steel and specially shot-peened with hard streel pellet at extreme velocities. The shot-peening process provides maximum wheel travel and ride quality, without sacrificing the life of your leaf. The entire leaf spring design functions to improve ride quality and maximize weight capacity for your specific make and model. Skyjacker Heavy-Duty Add-a-Leaf Springs feature a simple, bolt-on installation utilizing the pre-drilled holes at the factory position, ensuring a perfect fit on your vehicle's spring pack. What's more, the springs are backed by a Lifetime Warranty.