The DENSO IU24D is a high-performance Iridium spark plug designed to deliver superior ignition and combustion efficiency. Its advanced design ensures reliable starting and smooth engine operation under various driving conditions. Crafted with DENSO's expertise in ignition technology, this spark plug features a fine-wire iridium center electrode that requires less voltage to ignite, leading to improved fuel economy and reduced emissions. The U-groove ground electrode further enhances ignitability and prevents fouling. This spark plug is built to last, offering extended service life compared to conventional spark plugs. Its robust construction and premium materials ensure consistent performance throughout its lifespan, making it a dependable choice for your vehicle's ignition system.