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The NGK Iridium IX spark plug box of 4 combines a fine iridium center electrode with a tapered ground electrode to improve throttle response, starting and fuel efficiency. Iridium’s high melting point supports durability in high-temperature engines while trivalent metal plating minimizes corrosion and seizing for easier service. The premium ceramic insulator and copper core help ensure stable spark performance and reliable service life in demanding conditions.
NGK Iridium Premium Spark Plug Box of 4 (BR9EIX)
