31-6203 S&S Cycle Billet Aluminum Oil Pump For 1973-'91 HD® Big Twins
Billet Oil Pump Kit For 1973-'91 HD® Big Twins (without gears & shims)
Fitment: 1973-'91 Big Twins.
Features & Benefits:
- Same width oil supply and return gears as the stock HD® aluminum pump.
- S&S pinion and oil pump drive shaft drive gears increase potential oil volume delivery by 25% over stock on 1972 and earlier engines.
- Machined with an oil pressure relief bleed off passageway & relieves pressure build up on top of the valve to maintain consistent oil pressure.
- 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.
- The standard pump cover allows total flexibility for oil system configuration with a number of oil feed and return options.