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The COMP Cams Ultra Pro Magnum LS3 rocker kit converts rectangle-port LS3 engines to an adjustable valvetrain, supplying 1.8:1 rockers, guide plates, 3/8" studs and raised guide plates for 5/16" pushrods. Investment-cast 8650 chromemoly rockers feature a black oxide finish, needle-bearing fulcrums and hardened roller tips to increase strength and lift while maintaining reliable valvetrain geometry for higher-demand applications.
COMP Cams Rocker Arm KitLS3 1.8 5/16
