COMP Cams 4604-16 High Energy 3/8" Stud Diameter Polylock for Roller Rocker Arm
COMP Cams Magnum Polylocks are best for moderate lift and spring pressure applications. Designed for ultimate strength and locking force. Hi-Tech Polylocks work well in all high end race applications. The stud girdle polylocks are precision ground for minimum run out and tapered for extra strength in the locking area.