NGK Spark Plug IMR9D-9H (6544) – Single

NGK single iridium plugs are designed specifically for performance enthusiasts. The fine wire centre electrode ensures high durability and a consistently stable spark. Iridium alloy has an extremely high melting point, making it perfect for today’s high-tech, high-performance engines.

Features:

• 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.

Specifications:

• Th read Diameter: 10mm
• Thread Pitch: 1.0mm
• Seat Type: Gasket
• Reach: 19mm (3/4")
• Hex Size: 5/8" (16mm)
• Terminal Type: Solid
• Overall Height: ISO
• Gap: 0.035" (0.9mm)

Center Electrode

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

Ground Electrode

• Material: Platinum
• Type: Standard
• Shape: Taper Cut

Additional Details

• Quantity: 1
• Resistor: Yes
• Resistor Value: 5k Ohm
• Heat Range: 9
• Threaded Reach: 12.7mm

Torque Specifications

• Cast Iron: 7.2–10.8 lb. ft.
• Aluminium: 7.2–8.7 lb. ft.