NGK CR9EIA-9 - Iridium Spark Plug - 4-Pack/--
NGK CR9EIA-9 - Iridium Spark Plug Designed specifically for the performance enthusiast. Iridium IX offers extreme ignitability, improved throttle response and superior anti fouling. Fine Iridium tip ensures high durability and a consistently stable sparkIridium alloy has extremely high melting point, perfect for todays high-tech, high-performance enginesTrivalent Metal Plating - superior anti-corrosion and anti-seizing propertiesOutstanding acceleration, high fuel efficiency and durabilityUltimate design, technology and performancePlug Specifications Thread Diameter - 10mmHex Size - 19mm 34Firing End - High Performance IridiumResistor type