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The DENSO Iridium Tough spark plug (VKA20) is designed to deliver exceptional ignition performance and longevity. Utilizing advanced iridium alloy technology, these spark plugs offer enhanced durability and a more stable spark, contributing to improved fuel efficiency and engine responsiveness. Built to withstand demanding conditions, the Iridium Tough series ensures reliable starting and consistent performance across a wide range of operating temperatures. This makes it a dependable choice for drivers seeking optimal engine function.