1999- Superduty 4" Block Kit (ICO194275)The ICON Vehicle Dynamics 4 inch rear block kit is designed to provide a simple and effective rear lift solution for Ford Super Duty trucks. Featuring a square, non tapered design, these heavy duty blocks are engineered to handle the demands of towing, hauling, and off road use. Constructed from CNC laser cut and brake formed steel plate with heavy duty 0. 250 inch wall square tubing, the blocks are built for strength and durability. A reinforced bump