Tein SKS82-AUB00 S.Tech Lowering Spring for Subaru Impreza Front spring rate: 4.5 kilogram per millimeter (252 pounds per inch) Rear spring rate: 3.9 kilogram per millimeter (219 pounds per inch) Front ride height: -36 millimeter (-1.4 inch) Rear ride height: -29 millimeter (-1.1 inch) Progressive spring rate design