NGK Spark Plugs in a variety of sizes. Get your high - quality replacement parts here and SAVE BIG! Built to OEM specifications for replacement parts. NGK Spark Plugs are designed to operate over a much wider heat range than ordinary plugs. Each features high-alumina ceramics for better heat transfer and electrical insulation. More: Resistant to carbon build-up and pre-ignition; Patented triple-gasket sealing process eliminates gas leakage; Long insulator nose prevents fouling and misfiring; Solid copper core and nickel-tipped electrode for long life; Select size by NGK part number. Order yours today! NGK Spark Plugs, box of 4