NGK Laser Iridium Spark Plug LMAR9AI-8D - Set of 4

NGK Laser Iridium spark plugs (LMAR9AI-8D) are engineered to deliver the ultimate combination of performance, fuel efficiency, and service life. Designed as a high-performance replacement for vehicles originally equipped with fine-wire iridium alloy plugs, these spark plugs utilize a laser-welded iridium-tipped center electrode. This material is six times harder than platinum, providing exceptional durability and a stable spark even under the high-stress conditions of modern engines.

Built with a 98% pure copper core and high-grade alumina silicate ceramic insulators, the LMAR9AI-8D effectively manages internal temperatures to prevent overheating and pre-ignition. Most plugs in this series also feature a platinum chip on the ground electrode to ensure even wear in distributorless ignition systems (DIS). The trivalent metal plating provides superior anti-corrosion and anti-seizing properties, making these plugs easier to remove during future maintenance.

• Iridium-tipped center electrode for maximum spark stability and longevity
• Platinum disc welded to the backside of the ground electrode for even wear
• Trivalent metal plating for superior anti-corrosion and anti-seizing
• 98% pure copper core for improved heat dissipation and reliable starts
• Triple-seal construction prevents combustion gas leakage
• High-grade alumina silicate ceramic insulator for superior dielectric strength
• Manufacturer Part Number: LMAR9AI-8D
• Quantity: Set of 4