NGK Laser Iridium Spark Plug (ILTR5D)

The center electrode on these NGK Laser Iridium spark plugs is tipped with an iridium alloy, which is about six times harder than platinum. This makes them really durable and helps maintain a consistent, stable spark over their lifespan. They're built to be a direct replacement for your vehicle's original equipment, meaning they'll fit right and perform as expected. The pure alumina ceramic insulator helps manage heat effectively, and the trivalent metal plating on the exterior prevents corrosion and makes them easier to remove later on. You get a box of four plugs, which is what most common engines need.

NGK designed these plugs with a fine wire center electrode, which is great for ensuring a strong, reliable spark, especially in modern engines that demand precise ignition timing. The iridium alloy has a very high melting point, making it suitable for today's higher-performance engines. For vehicles with distributorless ignition systems, you'll find a platinum pad on the ground electrode that helps ensure even wear. These are a solid option if your vehicle came with fine wire iridium plugs from the factory, offering a good balance of performance and longevity.