Popular NKG Spark Plug models in convenient shop packs of 25. NGK spark plugs are built for longer life and optimum performance. Every NGK spark plug features trivalent metal plating for superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flashover for improved firing, while the pure alumina silicate ceramic insulator improves strength and heat transfer. The copper core aids in heat removal while the triple sealed gasket eliminates leakage. Key Features 25 spark plugs per pack Trivalent metal plating provides superior anti-corrosion and anti-seizing properties Corrugated ribs prevent flashover Pure alumina silicate ceramic insulator provides superior strength and better heat transfer Copper core aids in heat removal Triple seals prevent leakage Plug Selection To ensure optimum performance please consult your owner's manual to determine the correct spark plug for your engine.