These 1.7:1 ratio hardened steel rocker arms have elongated slots to provide extra clearance for high-lift (.600" and greater) camshafts. Use with all 396-502 Big-Block heads with adjustable rockers. Each assembly includes rocker arm as well as the ball and nut.
NOTE: Can be used on any Gen V or Gen VI by using rocker stud P/N 12368941.
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