NGK Spark Plug NGK's Copper Core high quality electrodes ensuse excellent performance durability. Plug types engineered for specific engines means easy starting smooth economical running. Superior performance in both two stroke stroke engines. Special ceramic resistor used in NGK plugs protects TV's radios against disruption by the electrical noise produced by high voltages without affecting performance. NGK Spark Plug Guide The lower the number the higher the heat range.
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