DNA Motoring For Mazda 3 BK/BL Shock Absorbers (Black)+Lowering Spring (Blue) Reduce the Effect of Traveling Over Rough Ground Lowers the Center of Gravity to Improve Performance and Increases Stability Reduces Squat During Acceleration, Body Roll at Corners and Excessive Nose-Dive Under Braking Improves Handling, Responses and Balance Lowering Rate: Front - 1.5" and Rear - 1.5" / Spring Rate: Front - 255 lbs/in and Rear - 235 lbs/in