ACDelco GM Original Equipment Iridium Spark Plug are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These Iridium Spark Plugs are a high-quality replacement for many vehicles on the road today. They are our latest in spark plug technology and an exact replacement for your vehicle's original components. Iridium composition provides a high melting point and great strength and provides excellent wear resistance and durability. ACDelco GM Original Equipment parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles.