I would save a little bit more money and get another kit. I installed my Zone 3 inch lift about 15k ago. I also got their sway bar QD's, and their front adjustable track bar. Well, the springs have sagged about an inch. The shocks are junk and way to soft for a lifted JK with bumpers and other protection. The front QD's have fallen apart a few times (I have them welded in place now, I will replace them when I install the new axle) ,...and the best part. Their front track bar stripped itself out and fell apart on the expressway when I was going abour 70mph and through me into a un-recoverable "death wobble" and I had to pull over and drive like 30mph home.
So, In my opinion, go with another company. I wanted to give their kit a shot, because I'm from Michigan and thats where they're made, just trying to support some of the local guys. Dave from Zone did write me back the other day, and offered to look at the parts, and maybe replace them. After the experience I had though, I choose to upgrade to better quality parts.