NGK Laser Iridium Spark Plug Box of 4 (SILMAR9B9)

The NGK Laser Iridium spark plug uses a fine wire center electrode made from an iridium alloy, which has an extremely high melting point. This design is key for providing a stable spark and ensuring durability, especially in today's high-performance engines. These plugs are built to OE standards, meaning they are a direct replacement for your vehicle's original equipment. They are well-made with a pure alumina silicate ceramic insulator that offers superior strength and helps with heat transfer, while the trivalent metal plating resists corrosion and seizing. This set comes as a box of four, perfect for most 4-cylinder engines.

NGK's Laser Iridium plugs are designed to offer a great combination of performance and longevity. The iridium center electrode is significantly harder than platinum, contributing to a longer service life. You'll also find a platinum fine wire tip on the ground electrode, which helps ensure even wear, particularly in distributorless ignition systems, and contributes to a more consistent spark. The copper core inside helps manage heat, and triple seals are used to prevent any leaks. These are a solid option for vehicles originally equipped with iridium spark plugs.