BMR 15-17 S550 Mustang Front Performance Version Lowering Springs - RedLowers the front of your S550 Mustang for an aggressive look; Improves handling and ride quality; Provides a minimum drop; 170 lb in linear rate; Manufactured from chrome silicon high tensile spring wire; Cold wound on a CNC Coiling Machine to exact specifications; Lifetime warranty against spring sag; Stress relieved at 750 degrees F; Shot peened; Computer tested for accurate height and spring rate; Made in the U. S. A. This Part Fits: Year Make