Take your rocker arms to the top level with more horsepower and reliability with race proven performance from Scorpion Racing. Give your small block Chevy the rock-solid valve control of shaft mount rocker arms. Made in the USA for the most demanding endurance racing applications, Scorpion’s Endurance Series Shaft Mount Rocker Arms smoothly transfer camshaft motion to the valve by properly positioning the rocker over the valve. Since the rockers are mounted on a single horizontal shaft, rather than on separate studs that may flex, valve train stability, stiffness and geometry are improved considerably. And a stable valve train means better performance and more horsepower potential.