Exit series X0 UTV shocks are piggyback (Shown). This set of four shocks come standard with HTC springs, and single rate spring combination. Pre-load adjustment ring is also standard on all EXIT shocks giving you some tuning adjustment. All aluminum parts are anodized for a durable long lasting finish. Exit shock technology comes from 15+ years of off-road racing experience to give you the ultimate in ride quality, which is easily serviced for years of reliable use. All Exit shocks come with our ride quality guarantee. If for any reason your not satisfied with the way they are performing. Just call us within the first 60 days of use. We will re-spring, and re-valve until you are satisfied, no charge . Set of four shocks.