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The NGK Iridium IX BPR7EIX is a single iridium spark plug with a fine center electrode, a 14 mm thread, a 19 mm reach and a 5/8-inch hex. Its iridium tip is far finer than a platinum or nickel electrode, which lowers the voltage needed to fire and eases the load on coils and ignition parts. It suits drivers who want sharper throttle response and steadier idle from a stock or lightly modified engine. Against platinum plugs it trades a shorter service reputation for better ignitability; against standard nickel plugs it costs more but lasts longer and fires more reliably.
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Owners and mechanics rate the Iridium IX highly for smooth idle, quick starts and long life. Many report better throttle response after swapping from worn nickel plugs. A few warn about fakes and about damaging the fine tip during gapping.
The NGK Iridium IX BPR7EIX is a spark plug with an iridium center electrode. The iridium electrode is 25% smaller than a platinum electrode. It is one quarter the size of a conventional nickel electrode.
The ultra-small diameter center electrode reduces the voltage requirement and extends ignition system life. The metal shell has a new plating with enhanced anti-corrosion qualities.
