For sale is AC Delco R46XL spark plugs, also known as the NGK B5ES equivalent. These spark plugs are new old stock and have never been used or installed. They are designed for use in classic vehicles and are compatible with various ignition systems and components. The brand is known for its quality and reliability, making these spark plugs a great choice for anyone in need of a replacement or upgrade. Don't miss out on this opportunity to enhance your vehicle's performance with these AC Delco spark plugs.