NGK Laser Iridium Spark Plug Box of 4 (LZMAR8AI-10)

This is a box of four NGK Laser Iridium spark plugs, part number 94021. These are designed as a direct replacement for your vehicle's original equipment spark plugs, offering a solid blend of performance and how long they last. The fine wire center electrode, made from an iridium alloy, has a very high melting point, which helps ensure a stable spark even in today's advanced engines. NGK uses a pure alumina silicate ceramic insulator for strength and good heat transfer, and the trivalent metal plating on the outside helps prevent corrosion and seizing.

You'll find that most of these Laser Iridium plugs also have a platinum pad on the ground electrode. This helps them wear evenly, especially in modern ignition systems that don't use a distributor. The copper core inside also plays a role in keeping the plug from getting too hot, while the triple seals are there to prevent any leaks. If your car came with fine wire iridium plugs from the factory, these are a great choice to keep things running smoothly.