It should come with just about everything you need. The diff drop is a spacer used to drop the front differential down 3/4 of an inch to decrease CV angles as to not cause excessive wear and tear. It doesnt alliviate all problems but does a decent job doing that.tntaco said:i was looking at the cornfed 3inch suspension "kit". it says it comes with a diff drop....not sure what that is but other than that is there anything else i will need that it does not include?besides bigger tires of course :lmao: