NGK R7440B-10T 5009 Spark Plug Racing R7440B10T

The NGK R7440B-10T 5009 Racing Spark Plug delivers reliable ignition for high-performance engines under demanding track conditions. Featuring a copper core and optimized heat range, this 14mm threaded plug provides a strong, stable spark, reduced fouling, and enhanced combustion efficiency. Durable ceramic insulation supports resistance to heat and vibration, ensuring consistent performance across prolonged racing sessions. Ideal for drag, circuit, and endurance applications, it promotes quick throttle response, improved power delivery, and reliable starts when you need it most.