Reinforced coil springs aim to improve roll rigidity by increasing the spring rate and improving steering stability by lowering the center of gravity. While balancing ride comfort and driving performance, the spring rate is set slightly higher at 39 N/mm at the front and 59 N/mm at the rear, and the change in vehicle height is about -15 mm for both front and rear.
While these are BP specific springs, they will mount to BL dampers, the height will just be slightly different due to the weight differences.
