This DENSO Iridium Long Life spark plug (part code SK16PR-E11) is engineered for superior durability and consistent ignition. Its advanced iridium construction ensures a long service life, reducing the need for frequent replacements. Designed to meet the demanding requirements of modern engines, this spark plug promotes efficient combustion, leading to improved fuel economy and reduced emissions. Trust DENSO for high-quality ignition components that deliver reliable performance mile after mile. Key features include a fine-wire iridium center electrode for precise spark generation and a platinum-enhanced ground electrode for extended lifespan. This combination guarantees optimal spark plug performance throughout its service interval.