This product, the first in the world, uses 0.4mm iridium alloy center electrode. A larger center electrode means a greater cooling effect and poorer ignitability. On the other hand, the 0.4mm diameter iridium center electrodes have an extremely small cooling effect, reducing non-firing and realizing assured ignitability, the basic function of a spark plug. Also, because taxis use liquefied petroleum gas (LPG) as fuel, a large electrode increases the required voltage, and because this places a larger load on high tension cords and coils, it affects the life of the vehicle. With its 0.4mm center electrode that keeps the required voltage low, it can be said that the Iridium Plus is a car-friendly spark plug.


Features

• Platinum-tipped ground electrode to realize high-performance operation and long life 
• High-strength insulator specially designed for taxis
• Less fuel consumption with a 0.4mm diameter center electrode
  
• Through steady ignitability, acceleration performance is greatly improved
  
• Realizing astounding life and durability with platinum ground electrodes