NGK R6252K-105 2741 Spark Plug Racing R6252K105

Engineered for high-performance racing, the NGK R6252K-105 spark plug delivers reliable ignition under demanding conditions. This 14mm diameter plug features a precision-centered center electrode, copper core for efficient heat transfer, and a robust insulator to resist fouling at high RPM. Designed to withstand aggressive tuning, it provides steady spark energy, excellent throttle response, and consistent firing across wide operating temperatures. Ideal for race bikes, karting, and tuned engines needing quick starts and predictable power. Install with standard tools and enjoy long service life due to NGK’s durable materials and meticulous manufacturing. The R6252K-105 complements performance maps where fast heat dissipation and strong ignition are critical, helping you extract every last horsepower while maintaining reliability.