HKS 50003-M45G Iridium M-Series Super Fire Racing Spark Plug

The HKS 50003-M45G is a high-performance M-Series Super Fire Racing spark plug engineered with advanced iridium alloy technology for exceptional ignition performance, durability, and resistance to carbon buildup under high-load conditions. Designed for enthusiasts running aggressive engine tuning, these plugs deliver reliable ignition even under extreme combustion pressures.

M-Series Advanced Features:

• 0.6mm ultra-fine iridium alloy center electrode for focused spark energy
• Platinum chip outer electrode for enhanced durability and wear resistance
• Short-type outer electrode design reduces vibration-induced wear
• Thermal Edge technology optimizes heat dissipation
• Spark Support Gap design improves flame kernel formation

Iridium Alloy Construction:

The iridium alloy center electrode features an exceptional melting point of 2454°C (compared to 1769°C for white gold), allowing the plug to withstand extreme compression ratios and minor detonation without electrode deterioration. The nickel-coated housing prevents premature corrosion and extends service life. Despite the ultra-fine electrode diameter, iridium's superior hardness ensures no sacrifice in longevity compared to conventional plugs.

HKS M-Series plugs are available in colder heat ranges (7 and up) for high-performance applications, with specialized heat ranges of 9 and up available for rotary engines. Sold individually—order the quantity needed for your application.