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3 Aluminum bodied rocker arms, like these Comp Cams Ultra-Gold ARC series, feature a lighter body than the typical steel roller rocker arm to free up power, and feature both a roller tip and a roller bearing fulcrum. However, aluminum rockers require more room, as they are physically larger than their steel rocker counterparts in order to have the same strength. This can cause fitment issues with head studs, valvesprings, and even the valve cover itself. View Related Article
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