Mifune Racing lowering springs have been designed to give your car superior handling with an aggressive race look. Most other brands use a linear rate, but Mifune utilizes a progressive rate for several reasons. A progressive rate allows a plush comfortable ride under normal travel, but since the rate shifts higher during compression, it stops "body roll" during heavy braking, hard acceleration, or fast cornering. By lowering the center of gravity from OE height you dramatically improve performance and handling characteristics.