NGK Racing Series Plugs are Engineered to Withstand the Harshest Engine Conditions. The recommended spark plug of choice for high performance rotary engine, the NGK R6725-115 has an 11.5 heat rating designed for use with racing fuels including methanol, C16 and E85.
Additional features include:
- 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 Size: 14mm.
- Hex Size: 20.6mm.
- Reach: 21.5mm.
- Seat Type: Gasket.
- Gap: 0.7mm.
- Terminal Type: Solid.
- Resistor: Yes.