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The NGK CR10EIX is a single iridium spark plug from NGK's Iridium IX line, part number 6482. Its 0.6 mm iridium center electrode is far finer than a platinum or nickel tip, which lowers the voltage needed to fire and eases load on coils and ignition parts. The heat range 10 is a cold plug, aimed at high-revving, high-compression or heavily loaded engines rather than stock street motors. Against platinum and nickel plugs it lasts longer and sparks more reliably, but it is a race-grade heat range, so a stock engine usually wants a hotter plug.
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Owners of high-performance and tuned engines rate the Iridium IX plugs for smooth running and long life. Some buyers note that the cold heat range suits race use, not everyday stock motors.
The NGK Iridium IX CR10EIX is a resistor spark plug with an iridium center electrode tip. The iridium electrode is 25% smaller than a platinum electrode and a quarter the size of a conventional nickel electrode. This ultra-small center electrode reduces the voltage requirement and extends ignition system life.
It has a necked-down, non-projected center electrode and a single grooved ground electrode. The metal shell has new plating with improved corrosion resistance. The plug has a threaded stud terminal and is intended for street riding.
