Set of Four NGK Iridium IX Spark Plugs for all 2006-2007 Mazdaspeed6, 2007-2013 Mazdaspeed3, 2013-2014 Focus ST vehicles. These spark plugs are designed specifically for the performance enthusiast that is running higher than stock boost levels. Iridium alloy is used in these great new spark plugs providing an extremely high melting point that is ideal for the high-tech, high performance engine in your Mazdaspeed, and Focus ST vehicles Features: - Fine Iridium Tip Has High Durability and a Consistently Stable Spark - Extremely High Melting Point - Trivalent Metal Plating - Superior Anti-Corrosion and Anti-Seizing Properties - Outstanding Acceleration, High Fuel Efficiency and Durability - Ultimate Design, Technology and Performance - Heat Range -1 Colder Than Factory Plugs
