The DENSO Iridium TT spark plug (part code IW20TT) is designed to deliver superior ignition performance and longevity. Utilizing advanced Iridium TT technology, these plugs ensure a strong, consistent spark, leading to improved fuel efficiency and smoother engine operation. DENSO's commitment to quality is evident in the construction of the IW20TT. The Iridium TT features a 0.4mm iridium center electrode and a platinum-tipped ground electrode, offering exceptional resistance to wear and erosion. This design promotes a longer service life compared to conventional spark plugs. Choosing DENSO IW20TT spark plugs means investing in reliable performance for your vehicle. They are engineered to meet the demanding requirements of modern engines, providing dependable starting and optimal combustion across a wide range of driving conditions.