NGK Iridium spark plugs. The Spark Plug serious enthusiasts rely on. 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 spark. Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines. Trivalent Metal Plating, superior anti-corrosion and anti-seizing properties. Outstanding acceleration, high fuel efficiency and durability. Ultimate design, technology and performance.Fits the following Jeep Model:2012-2014 Grand Cherokee 6.4 392 16peices Iridium IX
