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
- Reach12.7mm (1/2")
- Hex Size13/16" (21mm)
- Terminal TypeRemovable Nut
- Overall HeightJIS
- 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 Range6
- Torque SpecsCast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.