The 4 pc Champion Copper Plus 327 Spark Plugs are high-quality direct replacement spark plugs designed for various vehicles. These spark plugs come with a manufacturer warranty ranging from 7 years for Iridium to 2 years for Copper. The pack includes genuine Champion spark plugs made of copper material, ensuring reliable ignition performance. With interchange part numbers including NGK BPR6HS, Motorcraft AER32, and Denso Bosch 78-50, these spark plugs are a dependable choice for maintaining your vehicle's ignition system.