This DENSO Iridium spark plug, part code IW29, is engineered to deliver superior ignition performance. Its advanced iridium construction ensures durability and consistent spark energy, contributing to improved fuel efficiency and smoother engine operation. Designed for a wide range of applications, the IW29 provides reliable starting and sustained power output. Trust DENSO's commitment to quality for your vehicle's ignition system. Key features include a fine-wire iridium center electrode for precise spark gap and reduced voltage requirement, along with a U-groove ground electrode to enhance ignitability and reduce fouling.