NGK Spark Plug - 1961: The NGK Spark Plug 1961 is designed to provide high performance and dependable service for most automotive, marine, and small engine applications. It features a trivalent metal plating that provides superior anti-corrosion and anti-seizing properties, and its triple gasket seal eliminates the possibility of combustion gas leakage. The spark plug's copper core ensures a precise heat transfer and optimal performance.