CALL FOR DISCOUNTED PRICING NOT AVAILABLE ONLINE.** Vehicles with a 2-piece rear driveshaft may require carrier bearing drop 9649.** This lift is designed for vehicles without top mounted overload springs. If your vehicle has top mounted overload springs, a different rear u-bolt kit is required. For trucks with 1-7/8" rear block order part 11664 or 3.71" rear block kit order part 11684.