NGK Laser Iridium Spark Plug Box of 4 (IZFR7M)

The iridium alloy center electrode in these NGK Laser Iridium spark plugs has an extremely high melting point, making it well-suited for today's advanced engines. These are actual OE or equivalent replacement spark plugs, designed to offer a solid combination of performance and longevity. The pure alumina silicate ceramic insulator provides both superior strength and better heat transfer, while the trivalent metal plating helps prevent corrosion and seizing. You'll also find a platinum pad on the ground electrode for even wear in distributorless ignition systems, and the copper core aids in heat removal. Triple seals are included to prevent leakage, ensuring reliable operation.

NGK's high-grade ceramic and copper core work together to keep the spark plug from overheating, which helps ensure reliable starts. The fine wire center electrode is key to maintaining high durability and a consistently stable spark over time. These plugs are recommended for vehicles that originally came with fine wire iridium alloy plugs.