NGK Laser Iridium Spark Plug (IFR5T-8N)

This is a box of four NGK Laser Iridium spark plugs, part number 3508. These are designed as a direct replacement for your 2004-2005 Mazda Miata's original spark plugs. They help ensure your engine runs smoothly and efficiently by providing a consistent spark.

The center electrode on these plugs is tipped with an iridium alloy, which is significantly harder than platinum and offers excellent durability. This means they can last a long time and maintain a stable spark even in demanding conditions. The pure alumina ceramic insulator helps manage heat, and the copper core aids in removing excess heat from the plug. For added protection against corrosion and seizing, the metal plating is trivalent. Most Laser Iridium plugs also have a platinum pad on the ground electrode to help them wear evenly, which is especially useful in modern ignition systems.

These plugs are a solid option if your Miata came with fine wire iridium plugs from the factory. They are built to meet the original equipment standards for your vehicle.