HVHP Oil Pump Kit, UNV Cover, with Gear, Big Twin (84-91), Silver, Dyna, Softail, Touring

【S&S Cycle 31-6307 HVHP Oil Pump Kit, UNV Cover, Gear Driven, Big Twin (84-91) Silver, Dyna, Softail, Touring Engine Parts, Plot】
■Product Description Originally designed for S&S 4-1/8 bore V-series engines with piston oil jets, these high-volume, high-pressure oil pumps are also fully usable with genuine HD Evolution engines and S&S V-series engines. For 1984-91 HD Big Twins. Thinner than genuine pumps. Although there are fewer teeth, the teeth are larger, increasing oil volume on both the supply and return sides of the pump. The supply-side gear is 9% wider than genuine and standard S&S oil pumps. The return-side gear is 28% wider than genuine, scavenging the crankcase, reducing flywheel drag, and eliminating oil carryover. The increased scavenging capability results in various benefits, including reduced oil in the crankcase, reduced oil carryover, and a longer pump life due to excess oil from the pressure control valve being filtered. ■Compatible Models Harley-Davidson/Harley-Davidson Dyna Family, Softail Family, Touring Family ■Specifications Color: Silver Material: Aluminum Finish (Surface Treatment): Polished Accessories: Oil pump drive shaft of genuine length ■Notes *Images are for illustration purposes only. Includes items with different sizes and colors. Product design and specifications are subject to change without notice. Please be aware of this. *For Shovelhead engines, HVHP is not recommended as it may over-oil the top end unless the lubrication system is changed with an S&S valvetrain update kit.