Ultimate-match front coil shock springs for pan automobile front side suspension system system with 4mm king pin axle offer another array of options to fine-tune your car or truck. Powder color-coded for fast & effortless recognition. Silver color. Band of 2. Developed through significant evaluation and rushing experience. Stiffness is handled by the level for the wire as well as by the number of coils; softer springs have really a lower life expectancy "C" value, while stiffer springs have really an increased "C" value.