Tein SKF12-AUB00 S.Tech Lowering Spring for Hyundai Genesis Coupe Front spring rate: 2.9 kilogram per millimeter (163 pounds per inch) Rear spring rate: 5.9 kilogram per millimeter (140 pounds per inch) Front ride height: -27 millimeter (-1.1 inch) Rear ride height: -37 millimeter (-1.5 inch) Progressive spring rate design