JIMS Shovelhead Roller Rockers

• Stock Ratio 1.50:1

• 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