NGK Spark Plugs works in a considerably wide temperature range than regular plugs. Carbon buildup and pre-ignition are not a problem with them. High alumina ceramics is very important to improve heat transfer and electrical insulation. A revolutionary triple gasket sealing method minimizes combustion gas leakage, and a longer insulator nose keeps fouling and misfiring at bay. The solid copper core and nickel-tipped electrode give longer life. The 98 percent pure copper core enhances heat dissipation and lowers spark plug overheating for more consistent starts. For improved strength and heat transfer, use a ceramic insulator manufactured of high-grade alumina silicate. Threads are cold-rolled to prevent cross-threading and cylinder head damage. Key Features: Designed to work in a considerably wide temperature range than standard plugs. Carbon buildup and pre-ignition are not a problem. Ceramics with a high alumina content for improved heat transmission and electrical insulation. The electrode has a solid copper core and a nickel-tipped tip for longer life. The innovative triple gasket sealing method ensures that no combustion gas leaks through. Product Details: SKU: 86-4832 UPC: 087295448328 Weight: 0.15 LBS Brand: Autowares