Harley Davidson Oil Pump Ultima 98-518 High Volume Output 1984 - 1991 Big Twin EVO Shovelhead Models Polished 98-518

Harley Davidson High Volume Output Oil Pump 1984 - 1991 Big Twin EVO Shovelhead Models Polished 98-518, Ultima High Volume Polished Oil Pump 1984 thru 1991 Big Twin Modles. this Ultima High Output (H.O.) Oil Pump. Ultima's main focus on the development on the new oil pumps was consistency. Ultima pumps are checked on a Coordinate Measuring Machine, and flow tested on a test stand to insurethe oil pumps are consistent from one pump to the next, and the motor is getting adequate oil. Ultima's S.V. pump performs with similar characteristics of the stock pump for volume and pressure. The H.O. pump has a much greater potenial for pressure and volume. Unlike stock oil pumps which won't start feeding the bottom end oil until 2000+ RPM range to keep from floating bottom end bearings. Bottom line, you are getting a precise pump that you can be confident in.? Check fitting for Baggers due to master cylinder.