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The NGK Iridium IX spark plug is a high-ignitability upgrade for modified or performance applications. Its fine iridium center electrode and tapered cut ground electrode improve starting, idling and throttle response while supporting fuel efficiency and long life. Trivalent plating helps resist corrosion and seizing, making these plugs a durable step up from standard nickel alloy OE units for drivers seeking sharper throttle response and reliable spark.
NGK Iridium IX Spark Plug Box of 4 (DR9EIX)
