High Load Beehive® Spring KitCaracteristicas: Machined from a premium grade Hi tensile chrome silicon single conical ovate wire, shot peened with a specially processed thermal heat treat and super NexTex finish to give these valve springs the needed fatigue life to exceed the high demands of V Twin engines from stock to performance FEULING BEEHIVE valve springs use a smaller lighter weight retainer which drastically reduces the valve weight creating a quicker revving and smoother