Oil pressure regulation bypass routes excess oil directly to the supply side of the pump & reduces the amount of oil returned to the tank, less foaming and cavitation

• Oil pressure regulation bypass routes excess oil directly to the supply side of the pump & reduces the amount of oil returned to the tank, less foaming and cavitation
• Machined with an oil pressure relief bleed off passageway & relieves pressure build up on top of the valve to maintain consistent oil pressure
• S&S pinion and oil pump drive shaft drive gears increase potential oil volume delivery by 25 percent over stock on 1972 and earlier engines
• S&S® pumps for 1936-'67 engines used with the S&S® oil pump drive gears deliver 33 percent more oil than the original cast iron pump
• Same width oil supply and return gears as the stock HD® aluminum pump

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