As it came with the front correction brackets and the rear track bar relocation bracket, the only thing I added was 1/2 terraflex front spacer (had 1 1/2" spacers in before the lift was installed) and a Clayton front adjustable track bar. Rides great!
I put this kit in about two months ago on my 2020 JT Rubicon. Only thing not in the kit that I added was the AEV steering stabilizer. The difference is very noticeable. I do need to check the steering stabilizer though. It was kinda loose when installed, and the other day I noticed a bunch of oil/fluid on my garage floor. I think the stabilizer blew out based on the fluid and the very loose steering feel. I plan to take it off next weekend to check it out. Luckily I still have the factory.