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The NGK Iridium IX spark plug is built for drivers seeking improved throttle response, fuel efficiency and durable ignitability. A fine iridium center electrode and tapered-cut ground electrode boost starting, idling and acceleration, while iridium’s high melting point resists wear. Trivalent metal plating reduces corrosion and seizing, making these plugs a long-lasting upgrade from conventional nickel alloy replacements for modified or high-output applications.
NGK IX Iridium Spark Plug Box of 4 (UR5IX)
