Installed the pro-kit yesterday. What a PITA install! Definitely the most labor intensive spring swap I've done to date... although I'm used to spring rates and lengths in the sports car world and not heavy truck/suv springs. First time I've had to deal with a performance replacement spring that also needed to be compressed before buttoning up the front strut assembly. These things are long and heavy. Since mine is 4x4 we had to pull the driver side axle out of the hub to allow enough travel to get the strut assembly out.
Rears required removal of all outboard control arm connections as well as sway bar endlinks and brake line support brackets in order to get enough droop to pull the springs out... and even then it required a small pry bar to get them unseated.
All said and done it was well worth the effort. The drop is good and the handling is greatly improved. Much less boaty and flatter in the turns. The ride is slightly stiffer, but still very good and not harsh at all.
Front seems to have dropped a bit more than the rear so it has a slight rake to it... not quite what I had in mind. I'll see where it settles after an alignment. Also going to loosen and then re-tighten all the bushings under load at the same time and then re-evaluate.
We installed the Corsa exhaust at the same time so the vehicle has transformed completely overnight. With the two mods together the Jeep is significantly more fun to drive.... almost to the point where I don't miss the Cayenne anymore!
No pics yet, but I will post them soon. I apologize in advance, but I didn't take any before pics and took no previous measurements.