HKS 50003-M40-1 M-Series Super Fire Racing Iridium Spark Plug

The HKS 50003-M40-1 M-Series Super Fire Racing Spark Plug is engineered for high-performance ignition in demanding driving conditions. This premium racing spark plug features an iridium alloy center electrode that reduces voltage requirements while delivering superior ignition performance and extended durability.

Key Features:

• Iridium alloy center electrode for improved ignition efficiency and longevity
• Short-type outer electrode with anti-vibration design to resist engine movement and extend electrode life
• Spark Support Gap technology helps prevent carbon buildup under high-load conditions
• Thermal Edge design on ceramic insulator reduces carbon deposits after idling or varied combustion conditions
• Heat Range 8 equivalent (NGK reference)
• Thread Size: 12mm x 26.5mm
• Wrench Size: 16mm

HKS Super Fire Racing spark plugs are developed from extensive motorsports experience, providing reliable ignition, exceptional durability, and resistance to carbon buildup under high-stress engine conditions. Sold individually.