Seller notes

The DR5HS SPARK PLUG (86-4623) is a high-quality alumina silicate ceramic insulator with excellent strength and thermal expansion. It is composed of 98% pure copper core that improves heat dissipation and avoids spark plug overheating for more reliable starts. Anti-seize and corrugated ribs are no longer required to prevent flashover because of the trivalent plating. The high-quality material composition ensures the product's durability, optimum performance, and anti-corrosive feature for long-t...

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