Improve ignition efficiency and reliability with the HKS Super Fire Racing M-Series spark plug. Engineered for performance and boosted applications, these plugs use a 0.6 mm iridium center electrode paired with a platinum-tipped ground electrode for fast, stable ignition and superior combustion under high load. Ideal for modified RB engines, they deliver the durability and consistency demanded in both street and track environments.

• High-performance ignition: Ultra-fine iridium center electrode reduces voltage demand for stronger, more consistent spark—critical in turbocharged or high-compression setups.
• Enhanced durability: Platinum ground electrode and short-type shell resist electrode wear and detonation stress during sustained high-RPM operation.
• Anti-fouling design: Optimized insulator shape and heat range control prevent carbon buildup for cleaner firing and longer service life.
• Optimized heat range: Heat Range 7 is ideal for mildly to moderately tuned engines or sustained high-load driving conditions.
• Trusted HKS engineering: Designed and tested by HKS for precise ignition stability, ensuring consistent performance and reliability.

Vehicle Compatibility

• Nissan Skyline R32 (RB20DE / RB20DET / RB25DE / RB26DETT)
• Nissan Skyline R33 (RB20DE / RB25DE / RB25DET / RB26DETT)
• Nissan Skyline R34 (RB26DETT)

Notes

• Thread Size: M14 × 1.25 mm | Reach: 19 mm | Hex: 16 mm
• Heat Range: 7
• Recommended for turbocharged or modified RB engines requiring a colder plug.
• Always verify gap and torque to factory specification before installation.