Stud Mount, Full Roller, Aluminum, 1.6 Ratio, Fits 3/8 in. Stud, Chevy, Small Block Finally, high performance without a high price--COMP Cams High Energy die cast aluminum rocker arms. Comp Cams, a leader in valvetrain technology, has developed these High Energy rockers to provide superior strength to weight ratio to withstand the hardships of your street performance and mild race engines while adding valve lift. These die cast aluminum, larger-than-stock rocker bodies are designed to be stiffer and more durable. They feature needle bearing fulcrums and roller tips to reduce friction and lower oil temp for even more horsepower potential. Maybe you're on a budget or maybe you just appreciate getting the most for your coin; make an affordable choice without sacrificing performance--COMP Cams High Energy die cast aluminum rocker arms.