NGK Copper Core Spark Plug SILFR6A6 (8659)

The NGK Copper Core Spark Plug SILFR6A6 delivers reliable ignition and efficient performance across a wide range of gasoline engines. Built with NGK's copper core technology and a robust 14mm thread, this plug provides quick heat response, steady firing and durable electrode life. Ideal for modern passenger cars and small engines that require dependable start-up and smooth idle, SILFR6A6 combines a high-insulation ceramic body with a corrosion-resistant center electrode to resist fouling and extend service intervals. Precision-sealed for consistent spark delivery, it supports optimized fuel economy and reduced emissions without sacrificing power. Easy to install and compatible with many ignition systems, this spark plug helps maintain peak engine efficiency, smooth acceleration, and reliable cold starts.