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NGK Iridium IX spark plugs (box of 4, CPR8EAIX-9) are built for high‑ignitability and durability in modified or high-performance applications. The fine iridium center electrode offers long life and consistent spark, while trivalent metal plating helps resist corrosion and seizing. These plugs aim to improve throttle response, starting and fuel efficiency compared with standard nickel alloy replacements.
NGK Iridium Spark Plug Box of 4 (CPR8EAIX-9)
