NGK Spark Plug P/N:4004

NGK Spark Plug P/N:4004

NGK (4004) Spark Plug, BMR4A: 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