• Designed to reduce friction in the valve train and provide more horsepower with less heat in the top end
• Cast from 4340 chromoly steel and heat treated
• JIMS roller rockers feature a 660 bronze bushing fit to .007″-.0012″ for the best wear resistance and oil control
• With a roller tip made from bearing grade material which reuces valve guide wear and valve tip galling
• Other features include a segmented parabolic pushrod cup which reduces friction at pushrod ends and also puts the load on the outer perimeter of pushrod ends
• OEM 17360-66A , 17375-66A



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