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Heavy-duty yttrium-enhanced copper core center electrode for
superior reliability and increased resistance to spark erosion for a 50%
longer performance life vs. even OE plugs
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Tapered, v-profile nickel chromium ground electrodes improves cold start performance and increases fuel ignitability
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Angular, five-ribbed insulator design prevents misfire due to current leakage
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Nickel-plated rolled threads provides complete anti-seize and corrosion protection
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Metal glass fused resistor maximizes interference suppression
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Spark plugs 
