Set of Four NGK Iridium spark plugs (stock heat range) 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 requiring stock heat range plugs (0-75hp over stock power 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 - factory heat range
