The new ReadyLIFT Tundra front lift is achieved using the time-tested offset spacer design. These strong steel spacers attach to the factory strut - resulting in a factory ride - while positioning the suspension in such a way as to not increase track width. What does that mean? It means the front tires won't still out further than the rear tires like most other kits. It means owners can run stock 20" wheels and use the factory spare tire if needed (restrictions apply). The ReadyLIFT sub-assembly design features a truly innovative approach to dropping the differential. The differential drop system is engineered for easy installation and correctly positions the differential to maintain CV axle and driveline angles. With the 44-58770 lift kit customers can rest assured they will not be prematurely wearing out tires. The ReadyLIFT system is built around maintaining proper alignment and geometry specifications. For the rear, this kit includes the time-tested OEM-style cast iron rear lift blocks and longer U-bolts with hardware. Additionally, ReadyLIFT also includes thoughtful accessories such as new bump stop extensions all the way around as well as sway bar frame mount brackets to keep the front sway bar in a factory geometry. All of this contributes to an excellent driving and handling suspension system that truly enhances the typical Toyota Tundra truck.