This is the highest quality cast iron gear available anywhere at any price! You don't use composite or bronze gears with the stock cast iron hydraulic or solid lifter camshaft or you're most likely going to ruin the gear and the camshaft (and perhaps the engine!).
For use with stock cast iron reverse rotation engines, which is usually the RH engine in a twin-screw vessel and in some ski boats. Hardened to factory RC50-55 for longest possible life. Fits Pertronix, MSD and ChevProMarine HEI .500 diameter shafts.
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