NGK Spark Plugs 5123 Spark Plug Dr8Hs Each. These Spark Plugs by NGK Spark Plugs feature high alumina ceramics for better heat transfer and electrical insulation which will provide a longer plus life. For optimal performance the NGK Spark Plug Dr8Hs Spark Plug is designed to operate over a much wider heat range than regular spark plugs. With a longer insulator nose that prevents fouling and misfiring and a solid copper core and nickel tipped electrode this device will easily outlast the competition. If you need a reliable spark plug that will perform when it matters most then look no further than the NGK Spark Plug Dr8Hs Spark Plug Replacement. Features of NGK Spark Plugs 5123 Spark Plug Dr8Hs Designed to operate over a much wider heat range than ordinary plugs Resists carbon buildup and pre-ignition High alumina ceramics for better heat transfer and electrical insulation Solid copper core and nickel tipped electrode provide a longer plus life Patented triple gasket sealing process eliminates the possibility of combustion gas leakage Package Contents: NGK Spark Plugs 5123 Spark Plug Dr8Hs NGK Spark Plugs 5123/3000.6627: 5123 Spark Plug Dr8Hs Each