This air filter housing top lid is a perfect fit for your 1991 Ford Thunderbird 3.8L V6 4At AOD. It comes with a gasket and is made of durable plastic material. The rectangular air filter shape and dry features make it a reliable choice for your car. This vintage part is an OE/OEM part number E9SE-9A600-CA and is manufactured in the United States. It is not a universal fitment and is not superseded by any part number. The manufacturer part number is E9SE-9A600-CA and the OE/OEM part number is E9SE-9A600-CA. The item does not come with any manufacturer warranty.