The Denso #3297 Iridium LONG LIFE Spark Plugs are a high-quality pack of 4 spark plugs designed for cars and trucks. These spark plugs, made by the well-known brand DENSO, are known for their long-lasting performance and reliable ignition systems. The iridium metal in the spark plugs ensures a stable spark even under high temperatures and pressure, providing a consistent and strong ignition for your vehicle.