Our kit can be installed in. 2007-2015 Toyota FJ CRUISER 2WD 4WD. 2003-2018 Toyota 4RUNNER 2WD 4WD (Except XRES Suspension). The ratio of spacer thickness vs amount of lift is NOT 1:1. So adding a small amount of spacer (length) to the strut will result in a larger change in suspension.