Your kit consists of DJM 3" lowering beams for the front and a flip kit on the back.
The beams are a stock replacement and change the spindle location by 3 inches giving you a 3" drop in front. Nothing else is needed besides an alignment and drop shocks.
The flip kit is just a piece of metal used so that you can set your rear axel on top of your leaf springs, giving you 4" of drop. Drop shocks will be needed for the rear as well.
Edit: This might help as well: