I have a 2004 Stratus SXT coupe,2.4l, automatic. The rear suspension is sagging pretty bad and I am wanting to replace the rear coil springs. Depending on who you talk to, local shop or web, nobody can agree if it has variable rate or constant rate springs. Really don't know the difference between the 2, so either one is fine with me. I like a stiffer,sport suspension, but all in all, just want something that will fit and not "squat" when I throw some things in the trunk. It also has subs in the trunk right now. Any advice is greatly appreciated. Thanks