I only want to lower the rear end of my car (2014 gt brembo track pack car) I just want to level the car out. how low do I need to go? I heard no more than an inch and that will level the back end up. Is this correct? Also will I need an adjustable panhard bar? Has any other people done this to there car, only the rear springs if so please show some pictures and tell me how you like them.