HKS Super Fire Racing Spark Plug Set (Heat Range #9) Honda Civic Type R (FK8) / (FL5)

The HKS Super Fire Racing MR Series spark plugs are engineered for high-performance, direct-injection turbo engines where ignition stability and heat resistance are critical. Developed as an evolution of the proven Super Fire Racing M Series, the MR Series utilises a ruthenium alloy centre electrode to significantly improve durability, wear resistance, and combustion reliability under high-load conditions.

Designed for M12 long-reach, protruding electrode applications, these plugs are ideally suited to modern performance engines such as the Honda Civic Type R (FK8 / FL5). Heat Range #9 is recommended for lightly tuned vehicles, including those running increased boost pressure or exposed to sustained high-temperature operation.

Key Features

• Ruthenium alloy centre electrode for superior durability and ignition performance
• Heat Range #9 suitable for higher thermal loads and light tuning
• M12 long-reach, protruding electrode design for direct injection turbo engines
• Enhanced reliability over conventional iridium and platinum plugs
• Improved combustion stability across the entire RPM range

Important Notes

• Only compatible with engines originally equipped with protruding-type spark plugs
• Installing protruding plugs in non-compatible engines may result in engine damage
• Always compare replacement plugs with OEM spark plugs before installation