HKS 50003-M40XL M-Series Super Fire Racing Spark Plug

The HKS M40 Super Fire Racing Spark Plugs are made to keep your engine firing strongly. Each plug features an iridium alloy center electrode that reduces voltage requirements while improving ignition performance and durability. The outer electrode is equipped with a platinum chip that also helps ignition performance, and has been shortened into an ideal anti-vibration shape for more longevity. The thermal edge of the ceramic insulator helps decrease carbon deposits that can build after long idles or other conditions. M-Series Super Fire Spark Plug Features0.6mm Iridium Alloy Center ElectrodeIridium Alloy Center Electrode reduces voltage requirement as well as improving ignition performance and durability.Outer Electrode with Platinum ChipThe 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)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. BenefitsThe outer electrode has been shortened and engineered with the ideal shape to decrease weight for resistance against vibration. This anti-vibration design improves longevity of the outer electrode.Thermal EdgeAfter 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 GapM Series is recommended for reliable ignition, durability and anti-carbon buildup under high load. ApplicationsHeat Range: NGK #8Thread Size: 12 x 26.5mmWrench Size: 16mm What's in the box?(1) HKS M40 Spark Plug

• Heat range is 8
• 0.6 millimeter iridium alloy center electrode
• Outer electrode with platinum chip