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COMP Cams Rocker ArmsGm LS1 1.8 3/8 Ult - cca1675-16 import_2022_03_21_012537 4949cc Engine Components::Valve Locks 1970-1974The Ultra Pro Magnum Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnum Rockers, but they also take stud mount rocker performance, stability and value to a whole new level. The modern arched, web like design delivers increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. * Investment cast 8650 chromemoly body and arched, weblike design deliver increased strength