Shock absorbers upgrade your air spring suspension. Load-adaptive shocks "T" into the air line for your air bags, automatically adjusting for a softer ride when your truck is unloaded and firmer support and better handling when loaded. Features: Automatically adjust support for a better balance between ride comfort and driving control. Softer damping when your vehicle is unloaded and stiffer damping when carrying a load. Damping level is controlled by the air pressure inside the air springs. No need to manually adjust the shocks. Adapt to different conditions. Tri-tube, mono-flow design performs well with various loads and temperatures. Protective urethane dust boot helps to prevent corrosion from road chemicals. Bolts on easily with basic hand tools Includes all parts needed for installation: 2 Rear, load-adaptive shocks Air tubing T-fittings 2-Year warranty With these shocks, you don't have to sacrifice a comfortable ride for better handling. They respond automatically to your air bag pressure, offering less damping when your air bags are less inflated and your vehicle is unloaded, thus ensuring a smoother, more comfortable ride. When the air bag pressure increases to support a load, the shocks also provide more damping to increase body and roll control, making driving much easier. Because these shock absorbers are activated by air bag pressure, there's no need to crawl under the truck to adjust them for different loads. The tri-tube, mono-flow design adapts to different loads and temperature conditions and features durable, precision-machined construction; polyurethane bushings; and double-welded loops for long-lasting performance. A protective urethane dust boot further shields your shock absorbers from road chemicals and grime. These shocks help you make the most of your air spring system.