NGK R7438-9 4656 Spark Plug Racing R74389

The NGK R7438-9 4656 Racing Spark Plug delivers race-ready ignition for high-performance engines. Precision-designed with a 14mm footprint, it provides reliable starts, strong flame initiation, and consistent power under demanding conditions. Built to endure high-compression environments, this plug supports rapid heat dissipation and stable combustion, helping maintain peak performance across laps and long runs. Ideal for competitive setups where dependable ignition and repeatable results matter.