Ultimate-match front coil surprise springs for pan vehicle front side suspension system with 4mm master pin axle offer an additional range of choices to fine-tune your automobile. Powder color-coded for fast & effortless identification. Silver color. Set of 2. Developed through considerable evaluating and racing experience. Stiffness is managed by the depth of the cable and in addition by the amount of coils; softer springs have really an inferior "C" value, while stiffer springs have in fact a larger "C" value.