ReadyLIFT OEM-style rear tapered block kits are available for 2017-2023 Ford Super Duty F250/F350 SRW model specific applications. These new 6.5" Rear Flat Block Kits include two (2) Rear Blocks, four (4) E-Coated U-Bolts, eight (8) Nuts and Washers and one (1) Carrier Bearing Spacer for two-piece drive shaft vehicles. Based on OEM designs and never made out of lightweight extrusions our 6.5" 2017-2023 Ford F250/F350 Super Duty Blocks have Integrated OEM Style Bump Stops. ReadyLIFT Block Kits will put a slight rake back in your truck for hauling or towing and are designed to work with your ReadyLIFT Suspension Leveling Kit. In fact, these blocks are the ideal Tow Package upgrade for not only for stock height vehicles but lifted or leveled trucks too! Like all ReadyLIFT products, these block kits come with our Limited Lifetime Warranty. Note: 26-2766 6.5" block is for use on 2017-2023 Ford F250 / F350 Super Duty 2WD/4WD trucks with 2-piece driveshaft. Lift height will vary depending on what factory block your truck has. Note: Fits Single Rear Wheel Trucks ONLY -- Not Dual Rear Wheel Configurations NOTE: The lift blocks in this kit are not designed to work with aftermarket or factory add-on air spring/load leveling kits that attach to the bump stop tangs. Use of this type of airbag system will void all block warranties and can cause failure of the block bump stop tang.