NGK Spark Plugs Spark Plug - 3641 is a high-quality spark plug designed for use in various types of engines. It is manufactured by NGK, a leading brand in the automotive industry known for its reliable and durable products. This spark plug features a solid copper core for improved conductivity and a triple gasket seal to prevent leakage. It also has a corrugated rib design to prevent flashover and a trivalent metal plating for anti-seizing and anti-corrosion properties. This spark plug is compatible with a wide range of vehicles and offers superior performance, fuel efficiency, and longevity.