Part Number: 20440-426-3 (Psu amp head and drive)Part Number: 2044O-426-3 (Psu amp head and drive)Part Number: 42231-204-00-1 (Psu amp head and drive)Part Number: 5840-99-777-2135 (Psu amp head and drive)Part Number: 5840-99-777-2136 (Psu amp head and drive)Part Number: 605111400002 (Psu amp head and drive)Part Number: D605111400002 (Psu amp head and drive)