I have almost convinced myself to Lower my 4.4. I am looking at the Eibach springs that lower the X 1.2''. The only problem that I face is do I or don't I? My shop said that the rear has a part from Eibach that will lower the rear but I know I have air suspension in the rear. I thought I had to go to the dealer for them to lower the rear. Does anyone have any experience with the Eibachs? So Yes or No with this MOD?