Copper Core Spark Plug

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Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100 percent leak proof) Multi-rib insulator reduces danger of flash-over One-piece terminal post adds strength Resistor reduces radio frequency interference (RFI) and electrode erosion Cold-formed steel shell precision rolled threads Full copper core electrode provides better performance in all conditions. Show more