BMR 07-14 Shelby GT500 Front Performance Version Lowering Springs - RedThis allows BMR to offer a LIFETIME WARRANTY against spring sag. Blending aesthetics and performance, BMR has designed the SP071 for the street performance crowd who want to use their cars in a variety of application. These springs will drop the front of your GT500 approximately 1 inch and feature a fine tuned spring rate to give you great handling and a smooth ride. The 220 lb inch linear spring rate offers plenty of support, keeping the body flat