Tein SKS80-AUB00 S.Tech Lowering Spring for Subaru Impreza Front spring rate: 3.1 kilogram per millimeter (174 pounds per inch) Rear spring rate: 2.9 kilogram per millimeter (219 pounds per inch) Front ride height: -38 millimeter (-1.5 inch) Rear ride height: -40 millimeter (-1.6 inch) Progressive spring rate design