126% feed and 131% scavenge volume compared to OEM (stock) M8 fourth generation oil pumps at 1000 rpm. 123% feed and 146% scavenge volume compared to OEM (stock) M8 fourth generation oil pumps at 2500 rpm. Scavenge side discharge was improved by modifying the suction ratio to help eliminate sumping from excess oil in the crankcase. Improved oil flow by inserting an oil passage correction spacer between the large-capacity oil pump body and the cam support plate.
