412M Comp Melonized Distributor Gear, Chevy .491" shaft

For your hydraulic or solid roller iron gear camshafts, it is recommended that you use a melonized distributing gear. These gears have undergone a "salt bath" nitriding process that gives them an extremely hard and slick surface to prevent excessive friction and wear, as well as rust accumulation. Used for factory engines, melonized distributor gears are harder than standard iron or bronze gears and can be used with any cam material.