High Volume High Pressure Oil Pump Only Kit For 1992-'99 HD® Big Twins - StandardFitment: 1992 '99 HD Big Twin Features & Benefits: Standard Billet Cover. No thicker than a stock pump. Gears with fewer, but larger teeth provide increased oil volume for both supply and return sides of the pump. Supply gears are 9% wider than stock and standard S&S oil pumps 28% wider than stock return gears ensure proper crankcase scavenging, reduce drag on the flywheels, and eliminate oil carryover. Increased scavenging capacity results in: Less