NGK R2349-9 4418 Spark Plug Racing R23499

The NGK R2349-9 4418 Spark Plug Racing delivers reliable ignition and enduring performance for high-demand engines. Designed for 12mm diameter ignition systems, these plugs combine a precise gap, optimal heat range, and robust electrodes to support consistent firing under demanding racing and sport driving. They provide fast, stable sparks, reducing misfires and improving throttle response, especially during high RPMs and under load. Built to resist fouling, corrosion, and thermal stress, the R2349-9 plugs help maximize horsepower, fuel efficiency, and engine longevity. Ideal for tuned street machines and competitive motorsports alike, they ensure dependable starts and predictable performance across a wide range of temperatures and operating conditions. Trust NGK’s engineering to keep ignition timing precise and power ready when you need it most.