I am just talking about raising the car up about an inch or so, just to give it the look of the rear end being up higher then the front, Im not crazy about the straight look the Challenger has, I've seen Chrysler Pacifica's plus numerious other cars that have the "jacked up" look to them from the factory. So I think an inch or so won't really effect my Vision all that much to be concerned about. I was just wondering, if I was to jack up the car if the rear coils would seperate enough to place spacers in them. And about lowering the front, I like the way the Challenger's front end sits up a little I really don't want to lower that at all.