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Insulator: The insulators are made of a highly purified alumina powder, which gives exceptional dielectric strength and thermal conductivity at high temperatures, as well as greater physical strength.
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Five-Rib Design: The five-rib design prevents flashover and decreases voltage loss.
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Copper-Glass Seal: A special mixture of copper and glass powder bonds the center electrode and insulator together for a gas tight seal. Proper heat is maintained and hot combustion gases are excluded.
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Copper-Cored Centre Electrode: A special center electrode incorporates copper into the core of the nickel chrome binary alloy. This gives superior thermal conductivity and increases the operating range.
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U-Groove Ground Electrode: The originally patented U-Groove allows the spark to fill the gap formed by the U. This ball of fire develops a larger and hotter flash front so combustion is complete.
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Patented Iridium Centre Electrode: Utilizes Iridium to create the world's smallest center electrode tip for maximum firing performance and reduced voltage requirements.
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Tapered Cut: Improves firing performance by reducing quenching.
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360° Laser Welding: DENSO perfected the Laser Welding Process, which provides a 360° seal so reliable the electrode resists wear even in the harshest conditions.
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100% Pre-Fired: All DENSO spark plugs are pre-fired at the factory to assure highest possible quality.
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