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NGK Laser Iridium SILZKR7E11 (part 92315) is a set of four iridium-tipped spark plugs with a solid copper core for heat dissipation and conductivity. The fine iridium center electrode and platinum-tipped ground electrode resist wear, so the plugs hold their gap far longer than nickel plugs. They are a direct replacement for the specific engines that call for this heat range, and they suit drivers who want long service intervals without chasing a hotter or colder plug. Against standard copper or platinum plugs, they cost more but need fewer changes; against other iridium plugs, the fitment list is the deciding factor.
In stock
Store links may earn us a commission. Price via Klarna.
Lowest price we've seen: $33.34 on Nov 10 at Walmart. Tracked across 1 store since Nov 10.
Feedback on this part is very limited, with a single five-star rating and no written comment. NGK iridium plugs broadly earn praise for longevity and steady idle, but that pattern is not confirmed here by volume.
This is a set of four NGK Laser Iridium spark plugs, part number SILZKR7E11 (model 92315). They are direct-replacement ignition parts made for specific vehicle fitments.
Each plug has a solid copper core. The core is built for heat dissipation, conductivity and a broad heat range.
