When I installed my leveling kit, I noticed my drivers side rear was sagging. I called Cornfed suspension and they made me a custom rear spacer for the drivers rear. Worked great, no more sag! Just need to tell them how much lift you need for the rear. Do not bother trying to go thru Burtman industries for this, I tried to buy my original lift and later the rear spacer from him. He would not answer phone calls, messages or emails. Cornfed will sell you a custom made rear spacer directly and they were very quick to make it and ship it out. Nothing but praise for Cornfed!