Tein SKB96-AUB00 S.Tech Lowering Spring for Acura TL Front spring rate: 7.2 kilogram per millimeter (403 pounds per inch) Rear spring rate: 3.9 kilogram per millimeter (157 pounds per inch) Front ride height: -38 millimeter (-1.5 inch) Rear ride height: -35 millimeter (-1.4 inch) Progressive spring rate design