Jap Performance Parts


Nissan Skyline R32/R33/R34 - HKS M-Series Super Fire Racing Spark Plug


Nissan Skyline R32/R33/R34 – HKS M-Series Super Fire Racing Spark Plug



50003-M35, 50003-M40, 50003-M45

All plugs are sold individually.

  • Heat Ranges: 7-9


Manufacturer Part Number: 50003-M35, 50003-M40, 50003-M45

*All plugs are sold individually.

HKS plugs can fit mulitple makes and models so if unsure please email us with your vehicle details to confirm fitments.

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

M-Series Super Fire Spark Plugs Feature

0.6mm Iridium Alloy Center Electrode

  • Iridium Alloy Center Electrode reduces the voltage requirement as well as improving ignition performance and durability.

Outer Electrode with Platinum Chip

  • The Outer Electrode incorporates a square platinum chip which improves durability, and when combined with the iridium center electrode boosts ignition performance. It also features a shortened tip design and tapered shape while maintaining the necessary space for proper ignition.

Short Type Outer Electrode (Anti-Vibration)

  • The outer electrode has been shortened and engineered with the ideal shape to decrease weight for resistance against vibration. This anti-vibration design improves longevity of the outer electrode.

Thermal Edge

  • After long idling or various combustion conditions carbon buildup can occur causing misfires. The Thermal Edge of the ceramic insulator will discharge to help decrease carbon deposits.

Spark Support Gap

  • Discharges will occur in the Spark Support Gap (space between the tip of insulator and the base of the outer electrode) to help prevent carbon buildup.

Performance & Efficiency

Increased Ignition Performance

  • Decreased voltage requirement strengthens ignition performance under harsh conditions like lean mixture or high boost pressure.

Improved Durability

  • New material and design improves durability, which allows for use under hard combustion conditions like continuous high load during circuit driving or aggressive tuning.

Decreased Carbon Deposits

  • Thermal Edge and Spark Support Gap help prevent carbon buildup for better ignition under various combustion conditions.

Additional information

Weight 0.5 kg



Skyline R32, Skyline R33, Skyline R34





Heat Range

7, 8, 9


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