HKS M-Series Super Fire Racing Iridium Spark Plug

HKS M-Series Super Fire Racing spark plugs are iridium spark plugs built for tuned and high-performance engines. They are designed for turbocharged, supercharged, and other modified applications where stock plugs may struggle to hold up under higher cylinder pressures and heat. They are also called racing iridium plugs or performance spark plugs.

Key Features:

• Iridium center electrode: The fine-wire iridium tip resists wear and supports a focused, consistent spark.
• Racing heat ranges: Multiple heat ranges are offered so tuners can match the plug to their power level and boost.
• Strong ignition performance: The design supports reliable ignition and stable combustion under demanding conditions.
• Durable construction: The plugs are built to handle sustained high-load driving, track use, and aggressive tuning.
• Trusted brand: HKS is a Japanese tuning specialist known for turbo, ignition, and engine performance products.

Choose the heat range and thread configuration that suit your engine setup and tune. Fresh, correctly gapped plugs help the engine start easily, respond crisply, and run consistently.