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The DENSO Iridium TT spark plug (IXUH22FTT) represents advanced ignition technology, offering superior performance and longevity. Engineered with a fine-wire iridium center electrode and a platinum-enhanced ground electrode, these spark plugs ensure a strong, consistent spark for improved combustion. This translates to better fuel economy, smoother engine operation, and enhanced throttle response. The Iridium TT series is built to withstand the demanding conditions of modern engines, providing reliable ignition over an extended service life. They are an excellent choice for drivers seeking to maintain or enhance their vehicle's performance.