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NGK Laser Iridium High Ignitability plugs are OE-grade replacements built for long service life. The iridium-tipped center electrode and platinum pad on the ground electrode resist wear, and the pure alumina ceramic with a copper core helps manage heat for reliable starts. They suit drivers replacing factory plugs on modern distributorless ignition engines who want a direct-fit part rather than an upgrade. Compared with standard platinum or nickel plugs, they last longer and hold spark performance, but they cost more and offer no gain on engines that don't call for iridium.
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Lowest price we've seen: $65.38 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.
Owners of these plugs generally report smooth idle, easy starts and long service life as direct OE replacements. Most criticism centers on cost and on the need to confirm the exact part number for the engine.
NGK Laser Iridium High Ignitability spark plugs are engineered for OE applications and tested to high standards for quality and durability. This listing is a box of 4 plugs, part number SILZKR8E8G.
The center electrode has an iridium tip, which is six times harder than platinum. The plug uses high grade pure alumina ceramic and a 98 percent pure copper core, which help prevent overheating and provide reliable starts.
The ground electrode has a raised platinum pad or a platinum fine wire tip. This gives even wear in distributorless ignition systems and improves spark performance.
