The DENSO Iridium TT spark plug (part code XUH20TTI) represents a significant advancement in ignition technology. Designed with a unique twin-tip iridium construction, these plugs ensure a powerful spark and consistent performance across a wide range of engine conditions. The Iridium TT series is built for durability, offering an extended service life compared to conventional spark plugs. This means fewer replacements and maintained engine performance over time. The advanced materials and precise manufacturing contribute to improved fuel economy and reduced emissions, making it an environmentally conscious choice. Experience enhanced throttle response and smoother idling with DENSO's innovative spark plug design. Whether for daily driving or demanding conditions, the XUH20TTI provides reliable ignition for a wide variety of vehicles.