NGK Racing Series plugs are engineered to withstand the harshest engine conditions. Fine wire platinum tipped center electrode and platinum tipped ground electrode improve ignitability, increase durability and enhance anti fouling capabilities. 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.
Specifications
Spark Plug - NGK Racing - 14 mm Thread - 0.847 in Reach - Gasket Seat - Stock Number 4311 - Resistor - Each
Shell
- Thread Diameter: 14mm
- Thread Pitch: 1.25mm
- Seat Type: Gasket
- Reach: 21.5mm (.846")
- Hex Size: 13/16" (21mm)
- Terminal Type: Solid
- Overall Height: ISO
- Gap: .028" (0.7mm)
Center Electrode
- Material: Platinum
- Type: Fine Wire
- Size: 1.0mm
- Projection: Non-Projected
Ground Electrode
- Material: Platinum
- Type: Flat
- Quantity: 1
Specifications
- Resistor: Yes
- Resistor Value: 5k Ohm
- Heat Range: 11
- Features: Extended metal shell
- Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.
Part Information
- Brand: NGK/NTK
- Warranty: 1 Year
- MPN: R6725-11
