ReadyLIFTft® OEM style rear block kits are available for model specific applications. The Rear Block Kits include (2) cast iron blocks, (4) E-coated U-bolts, (8) Nuts and Washers and will safely lift the rear of your truck and additional 1"-3" or more depending on application. Based on OEM designs and never made out of light weight extrusions, our rear blocks are made of cast iron and many of our blocks have Anti-Rotation and pinion angle correction built in. The Ford Super Duty 4" and 5" blocks have Integrated OEM style bump stops. These kits will put the rake back into your truck for hauling or towing and are designed to work in concert with your ReadyLIFT® Suspension Leveling Kit. Comes with a Limited Lifetime warranty.