NGK Laser Iridium Spark Plug Box of 4 (IMR9D-9H)

The fine wire center electrode on these NGK Laser Iridium spark plugs is made from an iridium alloy that has a very high melting point, making it well-suited for today's advanced engines. These plugs are designed as direct OE replacements, meaning they meet or exceed the original equipment specifications for performance and longevity. They are built to provide a consistently stable spark, which is crucial for efficient combustion and reliable engine operation across a range of vehicles.

NGK uses a pure alumina silicate ceramic insulator that offers superior strength and helps with heat transfer away from the plug tip. For added protection against corrosion and seizing in the cylinder head, these plugs feature a trivalent metal plating. The pure copper core inside the insulator aids in heat removal, preventing overheating, and the triple seals are there to prevent any leaks. Most Laser Iridium plugs also include a platinum pad on the ground electrode to ensure even wear, especially in modern distributorless ignition systems.

This box contains four spark plugs, suitable for many 4-cylinder engines or applications requiring multiple plugs. They are a solid option for vehicles that originally came with fine wire iridium alloy plugs, offering a direct replacement that maintains original performance and durability.