Sprocket kits include the following: Stock size Tusk front sprocket. Stock size Tusk Aluminum rear sprocket. Stock size Tusk Gold Plated Race chain. Front sprockets are manufactured to O.E.M., specs using high grade hardened steel. Rear Aluminum Sprocket made from 7075 T-6 heat treated Aluminum. Come with self-cleaning grooves. All match original equipment exactly for perfect fit and size. High quality 520 race chain. Features gold plating on the plates. Average tensile strength 8,900 lbs. Master Link included.