HVHP oil pumps have a new gear tooth profile with fewer but larger teeth that provides an increased oil volume for both supply and return-side of the pumpSupply-side gears are 9% wider than stockReturn gears are 28% wider than stock to ensure that the additional volume of oil supplied to the engine ..
This premium quality, steel-alloy oil pump pressure relief spring actually increases engine oil pressure by 2-3 psi, and does not interfere with critical bearing lubrication needs
BrandModelYearSales nameCountry version
Harley DavidsonE 10001952Hydra GlideALL
Harley DavidsonE 10001951Hydra Glid..