The NEW GENUINE GM ACDelco Spark Plugs R45XLS6 Set Of 8 are high-quality ignition components designed for gas-powered vehicles. Made by ACDelco Professional, a trusted brand in auto parts, these spark plugs are specifically manufactured for GM vehicles with the OE/OEM part numbers 19302730 and 05613946. With a voltage of 6V and a length of 4.12 inches, these spark plugs are made in China and come with a California Prop 65 Warning for nickel content. This set of 8 spark plugs is an essential component for maintaining the performance and efficiency of your vehicle's ignition system.