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NGK Iridium IX spark plug targets performance-minded drivers seeking improved throttle response, fuel efficiency and long-term durability. A fine iridium center electrode and tapered ground electrode yield exceptional ignitability, reduced fouling and crisper starting and idling. The iridium tip is significantly harder than platinum for extended service, while the ceramic insulator and trivalent plating support dielectric performance and corrosion resistance. Sold as a four-pack, Iridium IX is a durable upgrade for spirited or modified applications.
NGK Iridium IX Spark Plug Box of 4 (CR5HIX)
