HKS Spark Plugs for Toyota GR Yaris / GR Corolla | Iridium Racing + Platinum




  • Brand: HKS
  • Availability: In Stock
  • SKU: HKS50003-M40HL
  • Barcode:

HKS Super Fire Racing Iridium + Platinum Spark Plug

It's very important to provide reliable ignition for an engine to perform at a maximum power. HKS claim their spark plugs ignite faster and have a predictable strong spark to improve fuel efficiency and achieve the best performance in any conditions and environment.

Available in different heat ranges to suit completely stock engines to those that are highly modified.

Price is for ONE sparkplug.

Heat Range Conversion / Comparison :
HKS 25 30 35 40 45 50 52.5 55
DENSO 16 20 22 24 27 31 32 34
NGK 5 6 7 8 9 10 10.5 11

  • 0.6mm Iridium Alloy Center Electrode
    Iridium alloy center electrode reduces voltage requirement and improves ignition performance and durability.

  • Outer Electrode with Platinum Chip
    The outer electrode incorporates a square platinum chip which improves durability, and combining with the iridium center electrode boosts ignition performance. The outer electrode 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 under various combustion conditions, carbon buildup can occur causing misfires. The thermal edge of the ceramic insulator discharges to help decrease carbon deposits.

  • Spark Support Gap
    Discharge occurs in the spark support gap (space between the tip of insulator and the base of the outer electrode) to help prevent carbon buildup.


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