NGK Racing Series plugs are engineered to withstand the harshest engine conditions. Special insulator nose configurations improve throttle response. 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.
Thread Diameter : 14mm
Thread Pitch : 1.25mm
Seat Type : Gasket
Reach : 19mm (3/4")
Hex Size : 5/8" (16mm)
Terminal Type : Solid
Overall Height : ISO
Gap : .016" (0.4mm)
Material : Nickel
Type : Standard
Size : 2.5mm
Projection : Non-Projected
Type : Surface Discharge
Resistor : Yes
Resistor Value: 5k Ohm
Heat Range : 10
Torque Specs : Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.
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