HKS 50003-M45XL Iridium Spark Plug M-Series Super Fire Racing

The HKS M-Series Super Fire Racing Spark Plug is a high-performance iridium plug engineered for improved ignition performance, exceptional durability, and superior resistance to carbon buildup under high-load conditions. Designed for enthusiasts running advanced engine tuning, this plug delivers reliable ignition while maintaining smooth cold starts and responsive throttle performance.

Key Features:

• 0.6mm iridium alloy center electrode for concentrated spark energy and extended service life
• Platinum chip outer electrode for enhanced durability and consistent spark performance
• Short-type outer electrode design provides superior anti-vibration characteristics
• Thermal edge construction optimizes heat dissipation for reliable operation
• Spark support gap design ensures stable ignition even under high compression
• High melting point iridium alloy (2454°C) withstands extreme combustion temperatures and minor detonation
• Nickel-coated housing prevents premature deterioration and thread seizure

The M-Series spark plug utilizes iridium alloy specifically for its exceptional durability and reliability. Despite the ultra-fine electrode core, the plug maintains excellent longevity due to iridium's resistance to erosion. Available in colder heat ranges (7 and up) for turbocharged and high-performance applications, with specialized heat ranges (9 and up) offered for rotary engines. Each spark plug is sold individually.