Durable Components. Upgrade your rear suspension with Rough Country's Lift Block Kit. This 2" lift block is made of durable nylon composite blocks, making it stronger and offers a longer lifespan than cast blocks. Giving you a 2-inch rear lift, our Lift Blocks will increase ground clearance while maintaining factory ride quality. Designed to improve your truck's weight distribution, they can extend the life of your suspension by reducing rear sag. These powder-coated black Lift Blocks are also tapered to reduce driveshaft angle. With an installation time of 2-3 hours, Rough Country's Suspension Lift Blocks offer an inexpensive way to easily add lift to the rear suspension of your truck, jeep, or SUV.