NGK Laser Iridium Spark Plug Box of 4 (ILFR6T11)

This is a box of four NGK Laser Iridium spark plugs, part number 4904, with the specific model ILFR6T11. These plugs are designed as a direct OE replacement, meaning they are built to the same standards as the original equipment your vehicle came with. They fit a wide range of Lexus and Toyota vehicles, including models like the Toyota 4Runner, Lexus GX460, and Toyota Tundra.

The center electrode on these plugs features an iridium alloy tip, which is significantly harder than platinum and offers excellent durability. This fine wire design helps ensure a consistent and stable spark, which is crucial for efficient combustion, especially in today's high-tech engines. The pure alumina silicate ceramic insulator helps with heat transfer and provides strength, while the trivalent metal plating on the exterior helps prevent corrosion and seizing, making them easier to remove later. Most Laser Iridium plugs also include a platinum pad on the ground electrode for even wear in modern ignition systems.

NGK also incorporates a pure copper core in these plugs to help manage heat, preventing them from overheating. The triple seals are there to prevent any gas leakage. If your vehicle originally came with fine wire iridium alloy plugs, these are a solid option for replacement.