VW 1600 Based Bolt On Oil Pump With Cover For Filter. Late model replacement full flow oil pump with 31.9mm gears and special cover for screw on filter. Fits late 8mm case upright motors. Full flow in/out cover allows for conventional oil filter. Comes with hardware and gaskets. Does not fit with stock muffler. FRAM PH8A filter is what we recommend. 1600cc up to 1970 3 rivet flat or 1600cc 1971 - 1979 4 rivet dished.