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This DENSO IW31 spark plug features an iridium center electrode, offering superior ignitability and a longer service life compared to conventional spark plugs. Its advanced design ensures efficient fuel combustion, leading to improved engine performance and fuel economy. Engineered for demanding applications, the IW31 is built to withstand extreme temperatures and pressures within the combustion chamber. DENSO's commitment to quality manufacturing ensures that this spark plug will provide consistent and reliable ignition. Upgrade your vehicle's ignition system with the DENSO IW31 for enhanced power delivery and smoother engine operation. It is a direct replacement part designed for easy installation.