The Iridium IX Spark Plug is designed specifically for the performance enthusiast and offers superior anti-fouling. The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a ...

These are twin cam spark plugs, and when used, they give a gain of up to 3 HP. The NGK Iridium IX spark plug has an electrode of 25% smaller than that of platinum. It is a quarter size when compared ...