2003-2013 Dodge Ram 2500 4WD 2003-2022 Dodge Ram 3500 4WD *Fits 4" Axle Only *Does Not Fit Overloads Models The suspension on the advertised compatible vehicles requires a spacer that is not a 1:1 ratio; therefore the stated (lift) height is achieved after install, not the height of the spacer itself. For Example, a 1" to 1.4" thick spacer (depending on the application) will provide 2" of lift. What is a leveling kit? .