Eliminate truck sag, sway and bottoming out with ALPHA XD air bags / air helper springs from Pacbrake. Don't risk the air leaks and cold weather fractures more common in the plastic end caps of the other guys. Insist on Pacbrake quality, durability and value. Have you ever noticed a difference in ride control when driving empty vs. driving fully loaded? Your truck's factory suspension was designed as a compromise between capability and comfort. When hauling heavy loads, the rear springs can be pushed to the limit - resulting in excessive bounce, sagging ride height, and an overall feeling of instability. And, if you are hauling these massive loads on regular basis your truck needs some extreme duty air springs to level that load. With the simple addition of an Alpha XD 7500 Air Spring Suspension Kit by Pacbrake, you can distribute weight evenly to your tires, supporting any load without overtaxing your existing system. Alpha XD 7500 air springs are the only air springs on the market with one-piece aluminum end caps and 20 support wires giving you maximum strength and durability! The big 7-inch double convoluted bellow type air springs have increased volume for that added load-leveling capacity. Each Pacbrake Double Convoluted Air Spring Suspension Kit is equipped with corrosion-resistant roll plates, precision laser-cut powder-coated steel brackets, grade 5 plated hardware, airline, and all accessories required for the perfect bolt-on install. Pacbrake Air Springs come with a Lifetime Warranty. With Pacbrake Air Suspension Kits you can level your truck's stance and eliminate your vehicle's sag, sway, and bottoming out while providing added support for an overall smooth and safe ride.