Lift you jeep 3-7/16" + what ever the thickness of your spring pack is. This kit is built M.O.R.E. Bomb Proof! The Spring Perches and U-Bolt Plates are made out of 1/4" plate. The shock mounts are made out of 3/16" plate, unheard of thickness for these parts. 5/8" holes in U bolt plates for 9/16" U bolts. U-bolts not included. Does one axle, two are necessary to lift entire vehicle.