NGK R6725-11 4311 Spark Plug Racing R672511

The NGK R6725-11 4311 Spark Plug is engineered for high-performance ignition in racing and high-demand engines. Designed with a 14mm thread and precise heat range, it delivers reliable ignition, improved throttle response, and consistent spark under demanding conditions. Its robust construction features premium electrodes and a durable shell to endure elevated cylinder pressures and temperatures typical of race environments. Ideal for tuned engines and competitive applications, this plug provides steady performance, efficient combustion, and reduced fouling during extended sessions. Whether replacing worn plugs or upgrading for track use, the R6725-11 offers dependable ignition stability, quick starts, and enduring value for motorsports enthusiasts and professional racers alike.