Originally designed for S&S® 4 1/8 bore V-Series engines with piston oiler jets, these high volume high pressure oil pumps also work well in stock HD® Evolution® engines and S&S® V-Series engines. Fits 1984-'91 HD® Big Twins. 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 percent wider than stock and standard S&S® oil pumps. 28 percent wider than stock return gears ensure proper crankcase scavenging, reduce drag on the flywheels, and eliminate oil carryover. Polished Billet Finish. Increased scavenging capacity results in Less oil in the crankcase, Less oil carryover, Excess oil from pressure control valve is filtered & longer pump life. Equipped with a stock length oil pump drive shaft.

This Part Fits:

Year	Make	Model	Submodel
1986-1990	Harley-Davidson	FLST Heritage Softail	Base
1988-1991	Harley-Davidson	FLSTC Heritage Softail Classic	Base
1990-1991	Harley-Davidson	FLSTF Fat Boy	Base
1987-1991	Harley-Davidson	FXLR Low Rider Custom	Base
1984-1991	Harley-Davidson	FXRS Low Glide	Base
1984-1991	Harley-Davidson	FXRT Sport Glide	Base
1984-1985	Harley-Davidson	FXSB Low Rider - Belt	Base
1984-1991	Harley-Davidson	FXST Softail Standard	Base
1988-1991	Harley-Davidson	FXSTS Springer Softail	Base
1984-1986	Harley-Davidson	FXWG Wide Glide	Base