BMR 67-69 1st Gen F-Body Rear Lowering Leaf Springs (2in Drop) - BlackLeaf springs do much more than simply supporting the weight of the vehicle. They are responsible for locating the axle, setting pinion angle, and controlling rearend movement. This makes them a critical part of the rear suspension. BMR's leaf springs give a superior option to stock leaf springs that sag, rust, and do little to control axle wrap and wheelhop as they get older. The SP057 feature a 2 inch drop, three leafs, and a 190 lb in spring rate,