HKS Super Fire Racing MR45XLB

This is the HKS Super Fire Racing spark plug, part number 50003-MR45XLB. These spark plugs are built for performance applications, featuring a fine-wire iridium center electrode for improved spark energy and a platinum ground electrode for durability. The metal-shell construction helps prevent pre-ignition, and the plug's thermal-conduction design ensures it stays clean under demanding conditions.

The Super Fire Racing series is known for its ability to handle high combustion pressures and temperatures, making it a solid choice for modified engines or vehicles that see frequent hard use. The fine-wire design means less voltage is needed to jump the gap, leading to a more consistent and powerful spark. This helps ensure complete fuel burn, which can contribute to better throttle response and overall engine efficiency.