The Spark Plug-Iridium ACDelco GM Original Equipment 41-168 19459511 is a high-quality replacement spark plug designed specifically for GM vehicles. Made by ACDelco, a trusted OE brand, this spark plug features a durable construction with a nickel warning. The iridium material ensures reliable performance and long-lasting durability, making it an essential component for maintaining optimal ignition systems in cars and trucks. Upgrade your vehicle with this genuine ACDelco spark plug for improved performance and efficiency.