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The NGK Iridium IX spark plug is engineered for enthusiasts seeking sharper throttle response and better fuel efficiency. Its fine iridium center electrode and tapered cut ground electrode improve ignitability, starting and idling characteristics. Iridium’s high melting point and durable tip deliver long life and consistent spark, while trivalent plating, a copper core and premium alumina ceramic insulator provide corrosion resistance, heat removal and stable dielectric performance.
NGK Iridium IX Spark Plug Box of 4 (YR55IX)
