These COMP Cams High Energyâ„¢ Steel Rocker Arms with a pedestal mount and 1.6 ratio are designed for 1967-79 Oldsmobile 260-455 applications. Engineered to help eliminate the noise and slop associated with older worn and high mileage stock Rocker arms, High Energyâ„¢ Rockers feature a long slot for higher than stock lift Camshafts, these Rocker arms are an excellent replacement choice for engine rebuilds using either stock or High Energy Camshaftsâ„¢.Excellent replacement Rocker arms for engine rebuilds with a stock or High Energy Camshaftâ„¢Helps to eliminate noise and slop associated with worn or high mileage stock Rocker armsIncludes adjusting nuts and pivot balls where requiredFeatures a long slot for higher than stock life CamshaftsNitrided Rocker arms designed for higher spring pressures and hardened PushrodsNitriding increases hardness, improving durability and longevity