JIMS Rocker Arms Big Twin/XL 1045RR

The lightest rocker arm available, but still has superior strength characteristics due to its design, The strength of 660 bronze bushings and bearing-grade steel for the roller tip, Extensively tested under extreme conditions to ensure durability in your engine, Will accept cams with up to .700″ lift at a ratio of 1.625 (stock), Made in the U.S.A., Twin Cam rocker boxes may need to be clearanced.