This pack of 4 DENSO spark plugs, model W22FP-U, is a great choice for any gasoline engine. The standard U-groove configuration ensures a secure fit and the 14mm thread diameter is perfect for a 12V voltage. These spark plugs are made in Japan and are not considered vintage. The OE/OEM part number for this set is W22FP-U and the manufacturer part number is 4021. The brand is DENSO and the type is spark plug. These ignition system components are perfect for anyone looking to upgrade their car or truck.