98% pure copper core increases heat dissipation for more reliable starts and prevents spark plug from overheating

High-grade alumina silicate ceramic insulator for superior strength and heat transfer

Cold-rolled threads to prevent cross-threading and damage to cylinder heads

Trivalent plating eliminates need for anti-seize and corrugated ribs prevent flashover

Quantity: 1 per package

NGK Standard Spark Plugs are treated with corrosion resistant plating to ensure ease of installation and removal. The 98% pure copper core delivers increased heat dissipation for more reliable starts and reduced risk of overheating. Cold-rolled threads prevent cross-threading and damage to cylinder heads. Trivalent plating eliminates need for anti-seize. Corrugated ribs prevent flashover. High-grade alumina silicate ceramic.