Tein SKA34-AUB00 S.Tech Lowering Spring for Acura TL/CL Front spring rate: 5.3 kilogram per millimeter (296 pounds per inch) Rear spring rate: 2.8 kilogram per millimeter (230 pounds per inch) Front ride height: -45 millimeter (-1.8 inch) Rear ride height: -46 millimeter (-1.8 inch) Progressive spring rate design