All systems include springs, sliders, stop rings and complete setup instructions Race-proven durability and quality Engineered and tested by drivers For 2- and 4-seat vehicles with higher loads and multiple passengers More aggressive spring rates keep the machine balanced Adjustable shock lockout collars included to allow fine-tuning of the transition point of the dual-spring setup Improves turn-in response and better power hookup out of the turns Smoother ride over rough terrain Stiffer spring rates prevent bottoming in the G-outs Made in the U.S.A.. SHOCK SPRING KIT STAGE 3