Upgrade your vehicle's ignition system with this 4-piece genuine Champion Spark Plug kit. Compatible with RES8WYPB3, these Iridium XP spark plugs offer superior performance and reliability. They are suitable for direct replacement and come with no core charge. The pack size is 4, and the item length is 3.750 inches. These Champion spark plugs are designed to fit various vehicle types, including cars and trucks. They are interchangeable with Autolite Iridium XP XP5863DP2, Denso Bosch 83-49, Autolite NGK S198, Autolite Iridium XP XP5863, NGK 97177, and Champion Spark Plug RES8WYPB3. Buy them now and enhance your engine's efficiency and power.