Every spring produced by H&R comes from the H&R ISO 9001 certified engineering and manufacturing facility in Germany. All H&R springs are produced from a special 54SiCr6 spring steel, which has strength rated at 290,000 psi resulting in unrivaled tensile strength and resiliency. H&R Super Sport Springs offer the handling characteristics and aggressive appearance that you've been looking for, without the harsh ride characteristics of less-advanced spring systems. H&R Super Sport Springs feature more control and are engineered for the street, making them comfortable and fun to drive. Approx. Front Lowering: 1.6" Approx. Rear Lowering: 1.0" Please note that lowering amounts are averages.