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The NGK Iridium IX spark plug is a fine-wire iridium upgrade built for drivers seeking improved throttle response, ignitability and durability. It’s a strong replacement choice for performance-oriented or modified vehicles. Iridium center tips provide extreme ignitability and superior anti-fouling, while a tapered-cut ground electrode enhances starting and idling. Combined with trivalent plating, alumina ceramic insulation and a copper core, the design helps with heat control and long service life.
NGK Iridium IX Spark Plug Box of 4 (ZFR5AIX-11)
