The NGK Iridium IX DPR8EIX-9 is a resistor spark plug with a fine iridium center electrode, a grooved single ground electrode and a projected tip. Its 0.6 mm iridium tip is far thinner than a platinum or nickel electrode, which lowers the voltage needed to fire and eases the load on coils and ignition systems. The 5k-ohm resistor suppresses radio-frequency noise, and the metal shell plating resists corrosion. It suits riders and drivers replacing plugs on ATVs, UTVs, off-road bikes and street machines that take a 19.1 mm reach, 17.5 mm hex plug in heat range 8. Against standard nickel plugs it offers longer service life and steadier idle; against platinum plugs it fires more easily but costs more than a basic copper-core plug.
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Buyers rate it highly, with 4.7 out of 5 from 20 ratings. Owners report easy starting and smooth running after fitting, and many treat it as a dependable replacement for stock plugs.
The NGK Iridium IX DPR8EIX-9 is a resistor spark plug with an iridium center electrode. The iridium electrode is 25% smaller than a platinum electrode and one quarter the size of a conventional nickel electrode.
The ultra-small center electrode reduces voltage requirement and extends ignition system life. The metal shell has new plating with improved corrosion resistance.
It is used in UTVs, ATVs, off-road vehicles and street vehicles.
