Description
includes:
one M40i 50003-M40i plug
HKS M-Series Super Fire Racing spark plugs are high performance
Iridium plugs designed to handle advanced levels of tuning and provide
Improved ignition performance, durability and anti-carbon build-up.
0.6mm Iridium Alloy Center Electrode Iridium Alloy Center Electrode
0.6mm Iridium Alloy Center Electrode Iridium Alloy Center Electrode
reduces voltage requirement as well as improving ignition performance and durability.
Outer Electrode with Platinum Chip The Outer Electrode incorporates a square
Outer Electrode with Platinum Chip The 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)
The outer electrode has been shortened and engineered with the ideal shape to
The 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 Edge After 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 Gap
Discharges will occur in the Spark Support Gap (space between the tip of insulator and
Discharges will occur in the Spark Support Gap (space between the tip of insulator and
the base of the outer electrode) to help prevent carbon buildup.*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°C, opposed to the 1769°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.
