HKS S-Series Spark Plugs by HKS


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There is no sacrifice in any longevity
Iridium alloy is used because of its durability and reliability
Nickel coating prevents the spark plug from premature deterioration
Iridium plugs are available for multiple applications

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.