The DENSO Spark Plugs Iridium Power IXUH221 5356 (QTY 4) are high-quality spark plugs designed for optimal performance in engines. These silver spark plugs have a compact design, making them compatible with Denso engine models. The Iridium Power technology ensures reliable ignition and improved fuel efficiency, making them a great choice for car and truck owners looking to enhance their ignition system. With a metal construction and a sleek silver color, these spark plugs are a durable and stylish upgrade for any vehicle.