Reference OE/OEM Number Cylinder Head: 12200-HN5-670, 12200-HN5-M00 Intake Valve: 14711-HN5-M00, 14711-HN5-670 14721-HN5-M00, 14721-HN5-671 Outer Valve Spring: 14751-HN0-A00 Inner Valve Spring: 14761-HM8-000 Valve Retainer: 14771-KE5-000 Valve Cotter: 14781-HA0-770. Package Included 1X Cylinder Head 1X Spark Plug.