NGK LMAR9AI-8D Iridium Spark plug

Laser Iridium is designed alongside OEMs to meet quality and durability standards for each manufacturer. Featuring high-grade alumina silicate ceramic and fine wire center electrodes, the Laser Series brings OE performance to every engine. High-grade alumina silicate ceramic Creates a stronger insulator to reduce dielectric punchthrough (caused by spark exiting through the side of the ceramic). Cold rolled threads Prevents cross-threading and damage to cylinder heads. 98% pure copper core Increased heat dissipation for reliable starts, prevents spark plug overheating. Trivalent metal plating No anti-seize required. Ground electrode Designed to reduce quenching effect, resulting in better ignition performance.