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This DENSO Iridium TT spark plug, identified by part code IT16TT, is engineered for superior ignition and combustion efficiency. The Iridium TT technology ensures a strong spark and consistent performance, contributing to improved engine responsiveness and fuel economy. Designed for reliability, this spark plug meets high standards for durability and longevity. It is a key component for maintaining your vehicle's engine health and performance. Ensure optimal engine operation by replacing your spark plugs with this high-quality DENSO Iridium TT unit. Its advanced design promotes efficient fuel burning and reduces emissions.