NGK Laser Iridium Spark Plug Box of 4 (SILMAR10A9S)

This box contains four NGK Laser Iridium spark plugs, part number 7764. These are designed to be a direct replacement for your vehicle's original equipment spark plugs, offering a great combination of performance and long life. The pure alumina silicate ceramic insulator helps with heat transfer, and the trivalent metal plating on the body helps prevent corrosion and seizing, making them easier to remove later on. These plugs are built with a fine wire center electrode made of an iridium alloy, which has a very high melting point and provides a stable spark, even in high-performance engines. The ground electrode also features a platinum pad for even wear, especially in modern ignition systems.

NGK uses a 98 percent pure copper core inside these plugs to help draw heat away from the combustion chamber, preventing overheating and ensuring reliable starts. They also feature triple seals to prevent any leaks. While these are designed for OE applications, they are a colder heat range than the stock SILMAR9A9S, which can be beneficial for certain performance applications or if your engine runs hotter than stock.