NGK Iridium IX (Causes of spark plug fouling video)
www.YamahaT135.COM NGK spark plug demo on spark plug carbon fouling and ways how NGK removes the carbon fouling
Bosch Iridium Spark Plugs
Engineered for high performance and long life, this is the best in OE technology. Bosch Iridium's ultra-fine wire center electrode design ...
Denso Iridium Power Spark Plugs
Usage of Denso Iridium Power Spark Plugs at F1 and the world of motorsport
spark plugs testing: thin iridium vs stock nickel, part I
spark plugs testing: thin iridium vs stock, LANTECH SERVICE, Moscow