NGK Racing Spark Plug R2556G-10, Heat Range 10 (Box of 4)

NGK Racing spark plugs are engineered to withstand the extreme cylinder pressures and thermal loads of professional competition. These R2556G-10 plugs feature a cold heat range specifically designed for high-compression, turbocharged, or nitrous-fed engines where heat management is critical to preventing detonation. The specialized electrode configuration and fine-wire design ensure reliable ignitability and throttle response under grueling racing conditions.

• Manufacturer Part Number: R2556G-10
• Heat Range: 10
• Material: Pure alumina silicate ceramic insulator provides superior dielectric strength and efficient heat transfer.
• Trivalent Metal Plating: Features anti-corrosion and anti-seizing properties to protect cylinder head threads during frequent plug changes.
• Thermal Management: A built-in copper core facilitates rapid heat dissipation, protecting the electrode from melting under high load.
• Leak Protection: Triple seals prevent combustion gas leakage, while corrugated ribs on the insulator eliminate electrical flashover.
• Quantity: Set of 4 spark plugs.