Unleash the true potential of your engine with HKS M-Series Super Fire Racing spark plugs. Engineered to excel in high-performance tuning scenarios, these premium Iridium plugs deliver enhanced ignition performance, exceptional durability, and effective anti-carbon build-up capabilities. Regarded as some of the finest spark plugs available, the M-Series offers a reliable ignition system, optimal durability, and effective prevention of carbon buildup even under heavy load conditions.

The choice of Iridium alloy for these plugs stems from its remarkable durability and reliability. While narrow core designs in typical plugs often lead to a reduced lifespan, the inherent strength of Iridium ensures longevity is not compromised. With an impressive melting point of 2454 degrees C, surpassing white gold's 1769 degrees C, the electrode demonstrates exceptional resilience against high levels of compression and minor knocking, avoiding any performance deterioration. Furthermore, a nickel coating on the housing safeguards against premature plug degradation.

HKS M-Series Super Fire Racing spark plugs are available for various Applications, catering to a wide range of vehicles. They are offered in colder heat ranges of 7 and higher, and specifically for rotary engines, heat ranges of 9 and higher are provided. Elevate your engine's ignition system to new heights of performance and reliability with HKS's superior spark plugs.

NOTES: ALL PLUGS ARE SOLD INDIVIDUALLY

• 0.6mm Iridium Alloy Center Electrode reduces voltage requirement as well as improves 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.
• 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 the 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 the insulator and the base of the outer electrode) to help prevent carbon buildup.