4.2 you will need to slot floor to use 4L adjust rad release aircon pipes off clips on fire wall there's one more thing I'm missing lol.
-Braided brake lines
-brake bias bracket
-new coils
-new shocks
-both panhards
-draglink
-rear lower control arms
-new front radius arms. This stuff is not needed for a 2" lift with 2" body lift
... You realise he has edited the original post which was asking what you needed to do to go from a +2" to +4" suspension lift and realised he made a mistake and wanted 2+2"