HKS 50003-M45IL Spark Plug 9 (Long Reach)

ALL PLUGS SOLD INDIVIDUALLY*HKS S-Series Super Fire Racing Spark Plugs*HKS S-Series Super Fire Racing Spark Plugs are high performance Iridium plugs designed to handle advanced levels of tuning and still offer easy start-up and smooth idling.* 0.4mm diameter Iridium plug electrode core* U-shaped grooved electrode* S-Series Super Fire Spark Plugs are recommended for smooth cold starting, response and acceleration.*M-Series Super Fire Spark Plugs*HKS M-Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti-carbon build-up.* 0.6mm Iridium Alloy Center Electrode* Outer Electrode with Platinum Chip* Short Type Outer Electrode (Anti-Vibration)* Thermal Edge* Spark Support Gap*M Series is recommended for reliable ignition, durability and anti-carbon buildup under high load. The Iridium alloy is used because of its durability and reliability.  On an average plug, a narrow core typically shortens life span of plug but with the intense durability of iridium there is no sacrifice in any longevity.  With a high melting point of 2454 degrees C, opposed to the 1769 degrees C of white gold, the electrode can tolerate the high levels of compression and minor knocking without any deterioration. A nickel coating on the housing also prevents the spark plug from premature deterioration.  The Iridium plugs are available for multiple applications and offered in “colder” heat ranges of 7 and up and specifically for rotary, heat ranges of 9 and up are offered.
 
Heat Range: NGK # 9Thread Size: 14mm × 26.5mmWrench Size: 16mm