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The NGK Iridium IX spark plug targets modified and high-performance applications with a fine iridium tip that ensures durable, consistent spark and improved throttle response. Its tapered ground electrode enhances starting and idling, while NGK's ceramic insulator and copper core manage thermal performance. Trivalent plating protects against corrosion and seizing, making Iridium IX a high-ignitability upgrade from OE nickel plugs.
NGK Iridium IX Spark Plug Box of 4 (TR65IX)
