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The NGK ILKAR7B11 is an OE-spec iridium spark plug, sold here as a box of four. Its iridium-tipped center electrode is rated six times harder than platinum, and the alumina ceramic insulator with a 98 percent pure copper core helps it run cool and start reliably. It is a direct-fit plug for a long list of Toyota, Lexus, Scion and Pontiac four-cylinder engines, so it suits owners doing a scheduled tune-up who want factory-matched parts. Against generic platinum plugs it trades a higher part cost for longer service life and steadier wear in distributorless ignition systems.
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Lowest price we've seen: $14.69 on Nov 10 at Amazon; highest $18.92 on Nov 2. Tracked across 6 stores since Nov 2.
Owners of the listed Toyota and Scion engines report smooth idle and reliable starts after fitting these plugs, and many treat them as the factory-correct choice. Complaints center on cost and on the need to confirm the exact part number for their engine.
The NGK Laser Iridium spark plug (ILKAR7B11) is engineered specifically for OE applications and tested to high standards for quality and durability. It has an iridium-tipped center electrode, which is six times harder than platinum.
The insulator is high-grade pure alumina ceramic, and the core is 98 percent pure copper. This construction helps prevent overheating and provides reliable starts. Most Laser Iridium spark plugs have a platinum pad on the ground electrode for even wear in distributorless ignition systems.
