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NGK Iridium IX spark plug is a performance-focused replacement developed for drivers seeking sharper throttle response, better fuel efficiency and long-term durability. A fine iridium center electrode with a tapered ground electrode ensures extreme ignitability, reduced fouling and improved starting and idling. Iridium's high melting point and hard tip extend service life, while the ceramic insulator and trivalent plating bolster dielectric performance and corrosion resistance. Supplied as a four-pack, Iridium IX is a durable upgrade for demanding or modified engines.
NGK Iridium IX Spark Plug Box of 4 (TR5-1IX)
