The lift amount is equivalent to the spacer thickness, providing an easy and straightforward solution for leveling your vehicle. - Designed to directly replace existing components and fit for 1999-2010 Ford F-250 Super Duty V8 5.4L, 1999-2003 Ford F-250 Super Duty V8 7.3T, and 1999-2003 Ford F-350 Super Duty V8 7.3T.