Iridium Long-Life Spark Plug

The Denso FC16HR-Q8 Iridium Long-Life Spark Plug is engineered to meet the highest Original Equipment (OE) standards for performance, durability, and emissions. It utilizes DENSO's patented Iridium Alloy, featuring a 90% Iridium fine wire center electrode, which provides exceptional spark energy and sustained performance for over 100,000 miles. The platinum needle tip ground electrode is designed to minimize heat quenching, while the robust 360-degree laser welding process ensures a strong, reliable bond between the center electrode and the shell. This advanced spark plug is built to withstand extreme temperatures exceeding 4,000 degrees Fahrenheit, making it suitable for high-performance ignition systems and special fuel setups. Drivers can expect enhanced engine performance, including increased horsepower, quicker starts, and a reduction in misfires, especially under heavy loads. Furthermore, its innovative design contributes to improved fuel efficiency, positioning it as a cost-effective choice for long-term vehicle maintenance. With a 12mm thread diameter and a 1.25mm thread pitch, the FC16HR-Q8 offers precise fitment. Its gasket seat type ensures a proper seal, and the 26.5mm reach and 9/16" hex size are standard for many applications. The plug also includes a resistor (5k Ohm) to reduce electromagnetic interference.