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NGK Laser Iridium plugs use a laser-welded iridium center electrode tip with a platinum disc on the ground electrode, which slows wear and holds a stable gap over a long service life. The fine tip ignites the mixture easily, so cold starts and throttle response improve, and fouling resistance is better than on standard nickel plugs. This set pairs two RE7C-L and two RE9B-T plugs, OEM heat ranges for the engines that call for them. They suit owners replacing plugs at the factory interval or chasing a misfire, and they cost more than copper or platinum plugs but outlast them.
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Owners of cars and small engines report smooth idle, quick starts and long service life from NGK iridium plugs, and many treat them as the default replacement. Complaints center on cost and on counterfeit or wrong-heat-range plugs bought from unclear sellers.
These NGK Laser Iridium spark plugs use a laser-welded iridium center electrode tip, the smallest tip diameter available. A platinum disc is welded to the back of the ground electrode. Together, the iridium and platinum surfaces wear slowly, which supports a stable idle, resistance to fouling, improved fuel efficiency and lower emissions.
The plugs have trivalent metal plating that resists corrosion and seizing. The design is Original Equipment Manufacturer approved. The plugs are intended to give faster starts and quicker acceleration, along with better fuel economy and lower emissions.
