The Tuff Country rear block and u‑bolt kit for 1999–2016 Ford F-350 4WD (with factory overloads) delivers a 5.5-inch rear lift using a tapered cast iron block that fits between the axle and leaf spring. Each kit includes lift blocks and extended zinc-plated u‑bolts custom sized for the application. Intended for rear-axle use, this kit provides an economical solution to increase rear ride height for clearance or towing needs.
Tuff Country 99-16 Ford F-350 4wd (w/Factory Overloads) 5.5in Rear Block & U-Bolt Kit Tapered