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NGK Iridium IX spark plug (box of 4) targets performance upgrades and modified applications, offering a fine iridium tip for durable, consistent sparks and improved ignition efficiency. The tapered ground electrode aids starting and throttle response while iridium's high melting point supports high-temperature operation. These plugs balance acceleration, fuel efficiency and longevity for drivers seeking an upgrade from OE nickel plugs.
NGK Iridium IX Spark Plug Box of 4 (BR9HIX)
