You will need an external spring compression tool. Also, when you put the bags in the springs, it's a little easier if you fully deflate them, put the rubber cap to hold it deflated, then hwat the bags in very hot water. When you put the bags in the springs, put them in as high as they will go, Alsom the hole in the bottom for the hose is too small and you will have to drill it out and then deburr it.
I put mine in yesterday along with Koni adjustable shocks and urethane cradle bushings, :turbonaug but have not tried it yet.