its just the firmness. They are not terribly hard to change, but you just have to have the right tools. If you have the money for coilovers go with those. If not, check this thread out
http://www.club3g.com/forum/wheels-t...x-install.html. It breaks down most of the stuff. For endlinks go to rockauto.com they are moog and for spring insulators I went to autozone. mounts I went to rockauto.