HKS Super Fire Racing M40I

HKS Super Fire Racing spark plugs are manufactured from NGK using their top tier "Iridium + Platinum Double Performance" to provide reliable ignition performance that produces faster and more efficient combustion. This also provides accurate ignition that ensures reliable engine performance for a long time and in various environments. 

Features:

• 0.6mm Iridium Alloy Center Electrode: reduces voltage requirement and improves ignition performance and durability
• Outer Electrode with Platinum Chip: improves durability thanks to a shortened tip design and tapered shape 
• Short Type Outer Electrode (Anti-Vibration): engineered with the ideal shape to decrease weight for resistance against vibrations which in term improves longevity of the outer electrode.
• Thermal Edge: helps decrease carbon deposits that occur after long idling or under various combustion conditions
• 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