NGK Laser Iridium Spark Plug Box of 4 (ILKR9Q7G)

When you're looking to replace the spark plugs in your vehicle, especially if it originally came with fine wire iridium plugs, NGK's Laser Iridium line is a solid option. These plugs are built to match the original equipment specifications, meaning they're designed to work just like the ones that came from the factory. The fine wire center electrode, made from an iridium alloy, is incredibly durable and helps ensure a consistent, stable spark every time. This is important because a strong, reliable spark is key to getting the most out of your fuel and keeping your engine running smoothly.

What really sets these apart is the iridium center electrode, which is about six times harder than platinum. This extreme hardness means it can handle the high temperatures and pressures found in modern engines while resisting wear, giving you a longer service life. Plus, the pure alumina ceramic insulator helps manage heat effectively, and the copper core further aids in removing excess heat from the plug. For vehicles with distributorless ignition systems, you'll also find a platinum pad on the ground electrode, which helps ensure even wear over time.

NGK also adds a trivalent metal plating to the threads, which helps prevent corrosion and makes them easier to remove down the road. These plugs are a direct replacement for vehicles that originally specified fine wire iridium plugs, so you can be confident they'll fit right and perform as expected.