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This DENSO IW01-31 is a premium racing spark plug featuring an iridium center electrode. Iridium offers exceptional resistance to wear and high temperatures, ensuring consistent performance even under extreme racing conditions. The advanced design of this spark plug promotes efficient combustion, leading to improved throttle response and power output. It is built to withstand the demands of high-performance engines, providing reliable ignition and a long service life. DENSO is a globally recognized leader in ignition technology, and this racing spark plug reflects their commitment to quality and innovation. Upgrade your vehicle's ignition system with this top-tier component for optimal performance.