Iridium tipped centre electrode and projected platinum tipped ground electrode, The double fine electrode design results in the most efficient spark plug design offering the highes ignitability. High ignitability results in improved emissions as well as increased power and fuel economy, Manufactured to OEM standards. These spark plugs are like the high-performance athletes of the automotive world. With their iridium-tipped center electrode and platinum-tipped ground electrode, they bring their A-game to the ignition party. The double fine electrode design is like a precision dance move for your engine, delivering the most efficient spark plug design in the game. What does that mean for you? It means higher ignitability, which translates to cleaner emissions, more oomph under the hood, and even better fuel economy.