Team Performance Solution Hyvo Top Gear - 19T Sprocket, 15T Internal 351352-004 Manufactured at TEAMs ISO 9902 certified facility using the latest technology Made with heat-treated, case-hardened machine steel High-quality construction means gears have proper fitment and maximum efficiency TEAM Hyvo gears for Polaris and Yamaha Use 3/4 Hyvo top and bottom gears