This DENSO Iridium Spark Plug, part code IK16, is engineered for superior ignition and combustion. Its advanced iridium alloy construction ensures durability and consistent performance across various driving conditions. The IK16 plug is designed to provide a hotter spark, leading to more complete fuel burn. This results in improved throttle response, better fuel economy, and reduced emissions. DENSO's commitment to quality means you can rely on this spark plug for dependable engine operation. Upgrade your vehicle's ignition system with the precision and reliability of DENSO. This spark plug is a direct fit for many applications, ensuring a straightforward installation process.