The DENSO Iridium TT spark plug (T16VR-U10) is engineered for superior ignition and durability. Featuring a unique twin-tip design with an iridium center electrode and platinum ground electrode, it ensures a powerful spark and reduces voltage requirement for consistent combustion. This advanced construction promotes better fuel economy and lower emissions, making it an excellent choice for a wide range of vehicles. The T16VR-U10 is designed to withstand harsh engine conditions, providing long-lasting performance and reliability. Upgrade your ignition system with DENSO's cutting-edge technology. The Iridium TT series offers enhanced performance characteristics that translate to a smoother running engine and improved throttle response.