Mitsubishi Evo 4-8 – HKS M-Series Super Fire Racing Spark Plug (85111000)



50003-M35G, 50003-M40G, 50003-M45G

All plugs are sold individually.

  • Heat Ranges: 7-9


Manufacturer Part Number: 50003-M35G, 50003-M40G, 50003-M45G

*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


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Heat Range

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