Economical performance and improved ignitability over standard NGK Spark Plugs original equipment manufacturer and racer approved. Lowers ignition system voltage requirements. Greater ignitability and performance over conventional spark plugs. Increased fuel economy and lower emissions. Highly durable against electrical and chemical wear. 45 degree V-Power center electrode increases anti carbonization characteristics and performance. Trivalent Metal Plating offers superior anti corrosion and anti seizing properties while the triple gasket seal eliminates combustion gas leakage.