HKS M-Series Super Fire racing Spark Plugs Heat Range 9 | Nissan 350Z / 370Z / R35



HKS M-Series Super Fire Racing spark plugs are high performance Iridium plugs designed to handle advanced levels of tuning and provide Improved ignition performance, durability and anti-carbon build-up.

The Iridium alloy is used because of its durability and reliability. On an average plug, a narrow core typically shortens life span of plug but with the intense durability of iridium there is no sacrifice in any longevity. With a high melting point of 2454 degrees C, opposed to the 1769 degrees C of white gold, the electrode can tolerate the high levels of compression and minor knocking without any deterioration. A nickel coating on the housing also prevents the spark plug from premature deterioration. The Iridium plugs are available for multiple applications and offered in ?colder? heat ranges of 7 and up and specifically for rotary, heat ranges of 9 and up are offered. M Series is recommended for reliable ignition, durability and anti-carbon buildup under high load. All spark plugs are sold individually.


  • 350z Rev-Up
  • 370z
  • R35 GT-R


  • Direct OEM replacement.
  • 0.6mm Iridium Alloy Center Electrode
  • Outer Electrode with Platinum Chip
  • Short Type Outer Electrode (Anti-Vibration)
  • Thermal Edge
  • Prevent Carbon Build Up
  • Heat Range: 9


  • This product is typically in stock.  If not in stock you will be notified of current lead times post order.
  • Ground shipping from port to your door additional at checkout.
  • Customers outside North America please inquire at for shipping options.
  • Image(s) shown may not reflect actual product.

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