NGK Spark Plug, Racing, 14mm Thread, 0.750" Reach, Flat Seat, Each (5238) (Manufacturer Heat Range : 9)

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.

Product Specifications :

Shell

• 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 : .031" (0.8mm)

Center Electrode

• Material : Nickel
• Type : V-Cut
• Size : 2.5mm
• Projection : Non-Projected

Ground Electrode

• Material : Nickel
• Type : Standard
• Quantity : 1

Specifications

• Resistor : No
• Resistor Value : 1K Ohm
• Heat Range : 9
• Features : Copper gasket
• Torque Specs : Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.