HKS Super Fire Racing M40G - Single HKS Super Fire Racing M40G - Single

The HKS Super Fire Racing M40G spark plug delivers a focused ignition solution for high‑performance and racing engines, engineered to improve combustion stability and throttle response without changing core engine components. Designed as a single-unit replacement from the HKS Super Fire Racing line, this plug supports aggressive timing and higher rev ranges commonly found in tuned Nissan, Toyota, and other performance platforms. Its racing-oriented design aims to provide consistent spark under load and repeated heat cycles, making it suitable for track use, spirited street driving, and performance builds where reliable ignition is critical. Ideal for enthusiasts seeking a bolt‑in ignition upgrade from a reputable motorsports brand, the M40G complements other HKS performance parts in a complete tuning setup.