These Rear Block Kits include (2) Rear Blocks, (4) E-Coated U-Bolts, (8) Nuts and Washers and will safely lift the rear of your Truck an additional 1 inch. Based on OEM designs and made from cast iron, never made out of light weight extrusions. ReadyLift Block Kits will put a slight rake back in your Truck for hauling or towing and are designed to work in concert with your ReadyLift Suspension Leveling Kit, or if you just want to add more rake to your truck. This is a great Tow Package upgrade that allows you to fully lift your truck while maintaining the use it like it was originally intended. Like all ReadyLift products these block kits come with our Lifetime Warranty. Installation time is about 1-1.5 hours.