NGK 3690 TR7IX Iridium IX Spark Plug

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: .039" (1.0mm)

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: 7
• Torque Specs: Cast Iron: 10.8-18 lb. ft. Aluminum: 7.2-14.5 lb. ft.