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The DENSO Iridium TT spark plug represents a significant advancement in ignition technology. Featuring a unique Iridium-TT alloy for both the center and ground electrodes, these plugs provide exceptional durability and a highly focused spark. This design ensures a more complete combustion process, leading to improved engine performance, better fuel economy, and reduced emissions. The enhanced ignitability of the Iridium TT plug also contributes to smoother engine operation and easier starting, especially in challenging conditions. DENSO's commitment to quality is evident in the robust construction of the Iridium TT spark plug, designed to withstand the demanding environment of modern engines. They are built for extended service life, offering a reliable ignition solution for a wide range of vehicles.