HKS Plugs ignite faster with a predictable strong spark to improve fuel efficiency and achieve the best performance in any conditions and environment. It's very important to provide reliable ignition for an engine to perform at a maximum power. HKS Super Fire Racing Plug is the best plug item for extreme racing conditions when used with nitrous or forced induction.
HKS Racing Spark Plugs are available in three heat ranges, either matching the factory heat range of 8 or up to two steps colder. These plugs are ideal and recommended for turbocharged, supercharged, or nitrous applications where a colder plug is beneficial.
- Heat Range 8 (Stock)
- Heat Range 9 (1 Step Colder)
- Heat Range 10 (2 Steps Colder)
(Heat Range is measured as an equivilent to NGK branded plugs)
HKS Spark Plugs are sold INDIVIDUALLY
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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