NGK IX Iridium Spark Plug Box of 4 TR55IX 7164

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 Diameter: 14mm
• Thread Pitch: 1.25mm
• Seat Type: Tapered
• Reach: 18mm (.709")
• Hex Size: 5/8" (16mm)
• Terminal Type: Solid
• Overall Height: ISO
• Gap: .059" (1.5mm)
  
  

Center Electrode

• Material: Iridium
• Type: Fine Wire
• Size: 0.6mm
• Projection: Projected

Ground Electrode

• Material: Nickel
• Type: Standard
• Shape: Taper Cut
• Quantity: 1
  
  

Specifications

• Resistor: Yes
• Resistor Value: 5k Ohm
• Heat Range: 5
• Torque Specs: Cast Iron: 10.8-18 lb. ft. Aluminum: 7.2-14.5 lb. ft.

Part Information

• Brand: NGK/NTK
• Longevity: 50k Miles