For Mazda Protege BJ Suspension Lowering Spring (Blue) Application: 99-03 Mazda Protege Front Drop Rate: 1.9" / Rear Drop Rate: 1.9" Front Spring Rate: 275 lbs./in. / Rear Spring Rate: 235 lbs/in. Constructed of SAE 9254 Chromed Cold Wounded Steel Material Improves Handling, Responses and Balance