New Casting Performance Aluminum Head, 64cc/210cc, 2.05/1.60 Valves, Hyd. Roller Springs .600 Max Lift. Our head outflows most heads in its class while keeping costs down. This is a 100% AMERICAN Cast, Machined and Assembled Head. Product Features:No core heads sold outright & shipped in HD cardboard box Sold as singles must be utilized in same pairs