Yamaha 663-13622-A0-00 Gasket Valve SeatGenuine OEM Yamaha part.Special Order Yamaha Marine Information:Additional Handling Time: Item transfers from an alternate warehouse requires an additional 23 business days to ship.Non Returnable: This item is ordered specifically for your application and cannot be returned or canceled once processed.Verify Fitment Before Ordering: Please confirm compatibility with your engine model.