High Pressure Oil Pumps, also referred to as an HPOP, are the preferred pumps for PowerStroke 6.0L and 7.3 engines. These pumps are designed for optimal engine performance. Since the pump delivers the oil to the injectors, it’s important that the pump regulates the proper oil pressure under different power circumstances. For instance, the amount of oil pressure needed for idling isn’t the same as what the PowerStroke engine needs for accelerating, or maintaining a steady driving speed. One must maintain the PowerStroke engines, as one would with any vehicle, as doing so determines the life of a high-pressure oil pump – saving one on costly repairs. ForDiesels.com offers a great selection of HPOP pumps.