There is no such thing as rear CC plates as far as i know because there is nothing to align. Only fronts. CC plates are a subjective matter. It really depends on how much you lower the car. Lowering the car too much will not allow you to dial in the right amount of caster without CC plates which will in turn cause bad wear on tires. If you plan on lowering 1 inch or less you won't need them too bad although it is good to have aftermarket CC plates even on a stock height car. I used eibach sportlines to drop mine 2 1/4 inches so for a drop like that you deff. need plates, and offset rack bushings, and preferebly a bump steer kit and X2 balljoints. There are alot of factors to consider when lowering a car that most people don't realize. If i coudl do it again i would look into some H&R's, pro-kit, or some FMS C springs before looking into the sportlines.