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NGK Laser Iridium spark plugs (box of four) pair fine‑wire iridium center electrodes with high‑grade alumina ceramic and a 98% pure copper core for improved durability and heat control. Iridium tips offer far greater hardness than platinum, and many Laser Iridium designs include a platinum pad on the ground electrode for even wear in distributorless ignition systems, supporting reliable starts and longevity.
NGK Laser Iridium Spark Plug Box of 4 (IZFR5K11)
