We have been making all of these parts and selling them individually for quite some time and I thought it was time to add a little incentive to get everything at one time! As a complets swap kit you are getting everything from the Differential Cover to the Ubolts, we have made the Spring hangers and Shackle hangers optional for those of you reusing the stuff you have, the rest you need to replace anyway. The totals are discounted from our standard prices. We just raised the cost of the Simple Swap $10, we did it so we could add the Shock Brackets (normally $14 a pair) because you most likely need those also.