NGK R7438-8 4905 Spark Plug Racing R74388

The NGK R7438-8 4905 Spark Plug (R74388) is engineered for high-performance racing engines, delivering reliable ignition at peak speeds. With a 14mm diameter format, it ensures a snug fit and stable voltage transfer, helping maximize power output and throttle response. Built for durability under demanding conditions, this plug supports consistent ignition, reduced fouling, and extended service intervals, making it an ideal choice for tuned race setups and competitive applications. Trust NGK’s precision engineering to maintain optimum combustion and engine efficiency, even under aggressive driving regimes and high-RPM operation.