NGK IX Iridium Series plugs were designed specifically for the performance enthusiast. Fine wire center electrode ensures high durability and a consistently stable spark. Iridium alloy has an extremely high melting point, perfect for today's high-tech, high performance engines.

• Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
• Corrugated ribs prevent flashover
• Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer
• Copper core aids in heat removal
• Triple seals prevent leakage

• Shell
• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat TypeGasket
• Reach19mm (3/4")
• Hex Size5/8" (16mm)
• Terminal TypeSolid
• Overall HeightISO
• Gap.031" (0.8mm)

• Center Electrode
• MaterialIridium
• TypeFine Wire
• Size0.6mm
• ProjectionProjected

• Ground Electrode
• MaterialNickel
• TypeStandard
• ShapeTaper Cut
• Quantity1

• Specifications
• ResistorYes
• Resistor Value5k Ohm
• Heat Range8
• Torque SpecsCast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.