Tein S Tech Springs are developed from years of Racing experience. Tein offers the S Tech Springs to provide an aggressive stance while still maintaining enough ride height to prevent the tires from rubbing. The S Tech Springs are a Hybrid Combination of a Sport Spring Ride with Race Spring Looks. To function like OEM springs, Tein S Tech Springs have rubber sleeves installed to help quiet the coils when the springs compress. Tein S Tech Springs are made in Japan and carry ISO 9001 Certification. The Average drop for Tein S Tech Springs is 1.75" inches. Tein S Tech Springs can be Installed on average in 2-4 hours with proper tools. Tein S Tech Springs come with a Limited Lifetime Warranty Against Sag.