The ACDelco GM#19307142 41-805 Spark Plug pack of 4 is a set of high-quality spark plugs designed for gasoline engines. Made with iridium material and manufactured in the United States by AC Delco, these standard configuration spark plugs are an essential part of the ignition system in your vehicle. With the OE/OEM part number 19307142 and manufacturer part number 41-805, these spark plugs are sure to ensure reliable performance for your car or truck.