ZERONE SSR 500 coilover kit is designed for drivers seeking improved handling on the street and at the track. Vehicle ride height and spring pre-load can be adjusted independently. Ride height is adjustable in two ways; adjustable shock length & adjustable spring seat. Aluminum spring seats are utilized to reduce ceasing of spring seat to threaded body and for improved durability. A shortened shell case is utilized to allow the most piston stroke possible, resulting in better ride and improved performance at lowered ride heights. SSR 500 is great for daily driving and occasion track use, whether it be at the drag strip, local circuit or Auto-X course.