Inlet and outlet ports need to be specified (type, size, location, minimum full thread length, etc.).Navistar typically uses:Port Connections (Port with O-Ring Seal in Truncated Housing) per SAE J1926-1 - Connections for General Use and Fluid Power - Ports and Stud Ends with ASME B1.1 Threads and O-Ring Sealing - Part 1: Threaded Port with O-Ring Seal in Truncated Housing/ EM16 - Dimensions and Specifications for Formed Tube Ends and O-Ring Boss Ports