NGK Laser Iridium Spark Plug (LTR6BI-13)

If you're looking to replace the spark plugs on your 2006-2015 Mazda MX-5 Miata, these NGK Laser Iridium plugs are a solid option. They're built to be a direct replacement for the original equipment, meaning they'll fit right in and work as intended. The main thing you'll notice with these is their longevity, thanks to the iridium-tipped center electrode, which is much harder than platinum and holds up better over time.

NGK uses a pure alumina ceramic insulator here, which is strong and helps manage heat effectively. You'll also find a platinum pad on the ground electrode, which helps them wear evenly, especially in modern ignition systems. The copper core inside also plays a role in keeping things cool, preventing overheating and ensuring reliable starts, even in colder weather. Plus, the trivalent metal plating on the threads helps prevent corrosion and makes them easier to remove down the road.

This set comes with four plugs, exactly what you need for your Miata's engine. They're a well-built choice if you want a spark plug that lasts and keeps your engine running smoothly.