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The NGK Iridium IX spark plug box of four delivers a fine-wire iridium center electrode for durable, consistent sparks and enhanced ignitability. Tapered ground-electrode geometry improves starting, idle quality and throttle response while resisting fouling. Trivalent metal plating offers anti-corrosion and anti-seize protection and the ceramic insulator with copper core helps with heat transfer, making these plugs suitable for modified and higher-performance use.
NGK IX Iridium Spark Plug Box of 4 (TR6IX)
