It is called road tamer from airlift, I am not sure that they have this kit anymore, but there are other companys that make an airride kit. yes I installed it myself, only a few holes to drill, for the track bar. It took me abour 4 to 6 hours, but I didn't hurry and took it over a couple days. Most springs will come off if you remove the u bolts and the hanger bolts. The front hanger bolt will have to be cut, because the fuel tank is in the way. The center bolt should be just sitting on that plate, or I should say sitting in a cut out in the plate. If you do a search on airride kits you should get a number of them, or I think an airlift rep posts on this forum, you can send him a pm and ask him if they still make the road tamer kit. I got mine at summit racing, it is only abot 30 miles from home. If you have any other questions, don't hesitate to ask.
03 Silverado cclb 3500 drw, D/A, Reese 22k hitch
07 Alfa SeeYa Gold 30RL,2 slides,power everything