The 6 pc DENSO 5353 Iridium Power Spark Plugs are a genuine product designed for direct replacement in car and truck engines. These spark plugs are manufactured by DENSO, a trusted brand known for quality and reliability. With a manufacturer warranty of 1 year and a pack size of 6, this set of spark plugs is a cost-effective and efficient solution for ensuring optimal ignition performance in your vehicle. The spark plugs are designed for easy installation and come with a free core charge, making them a convenient and valuable choice for your engine's ignition needs.