NGK Spark Plugs 4172 Spark Plug - BR8ECS. 473 is an effective means for ensuring you always have a working wire in your toolbox. These Tool Accessories from the experts at NGK Spark Plugs are designed to handle a much wider heat range than regular spark plugs. Plus the high alumina ceramic construction and electrical insulation of the NGK BR8ECS Spark Plug leads to a longer plus life. For a reliable and efficient spark plug that you can count on over the lifetime of your vehicle pick up the NGK Spark Plugs Spark Plug - BR8ECS. Features of NGK Spark Plugs 4172/5100.473 4172 Spark Plug - BR8ECS 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 4172/5100.473 4172 Spark Plug - BR8ECS NGK Spark Plugs 4172/5100.473: 4172 Spark Plug - BR8ECS