4-Hole Base Mount, Belt Drive, Base Oil Feed, Base Oil Drain, Service Units are furnished without governors and manifolds and may require head rotation and end cap rotation before installation or changeover. Includes Installation Gaskets. Base Mount Haldex (New and Remanufactured) EL1300/EL1600 4-Hole Base Mount, Belt Drive, Base Oil EL1600 Compressor End cap plugged , High Capacity. Changeover/Installation instructions - L31030.