The latest edition to the High Energy Series of Rocker arms includes all the same benefits as its predecessors and makes an excellent replacement Rocker for engine rebuilds with stock or COMP High Energy Camshafts. Nitrided for increased strength and durability, these Steel Rocker arms are designed for Small Block Chevy Applications that require a 1.5 Rocker ratio and a 7/16" Stud. All High Energy Rocker Arms help eliminate the noise and slop associated with worn or high mileage stock Rocker arms. They feature a long slot for higher than stock lift Camshafts and are engineered to handle higher spring pressures and hardened pushrods. High Energy Rocker Arms are also nitrided to increase hardness, thus improving durability and longevity. They ship with pivot balls and adjusting nuts when necessary for Installation.