<br><ul><strong>Superior construction, longer life, and optimum performance - all are standard with NGK, the brand specified as the #1 spark plug for performance</strong>.<br><br><li>Corrugated ribs help prevent "flashover" of spark which can lead to harmful misfires and rob you of performance</li><li>Highly pure alumina silicate insulator ensures dielectric strength and incrediblephysical strength - sophisticated ceramicproperties ensure proper heat transfer</li><li>Triple gasket sealing process virtually eliminates the possibility of combustion gas leakage back through the shell -other manufacturers use only one or two seals</li><li>Solid copper core ensures greater spark and heat transfer</li><li>Longer insulator nose, also called a "power tip", helps prevent loading up or foulingeven after prolonged periods of idling or at slow speeds</li><li>Shells are double dipped in a tough, corrosion-resistant zinc chromate coating ensuring maximum rust resistance</l