DENSO's Iridium TT spark plugs represent a significant advancement in ignition technology. Featuring a unique 0.4mm iridium center electrode and a platinum-enhanced ground electrode, these plugs are designed to provide exceptional durability and a powerful spark. The Iridium TT series is built to withstand the demanding conditions of modern engines, ensuring consistent performance across a wide range of operating temperatures and pressures. Their advanced design promotes cleaner combustion, leading to improved fuel economy and reduced emissions. With a lifespan that significantly exceeds conventional spark plugs, DENSO Iridium TT plugs offer a cost-effective solution for drivers seeking reliable and long-lasting ignition performance. They are an ideal choice for tune-ups and routine maintenance, ensuring your engine runs at its peak potential.