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NGK Iridium IX spark plugs provide improved ignitability, acceleration and durable service for performance-oriented applications. A fine iridium center electrode delivers significantly greater wear resistance than platinum, while the tapered ground electrode enhances starting, idle stability and throttle response. Trivalent metal plating helps resist corrosion and seizing, making these plugs a recommended upgrade over OE nickel-alloy spark plugs.
NGK Iridium IX Spark Plug Box of 4 (GR4IX)
