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 and 1-7/8" rear blocks. If your model has 1-7/8" rear blocks AND top mounted overloads, u-bolts 11874 are required. If your truck has 3.71" rear blocks and top mounted overloads, 11924 u-bolts are required.