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.