The NGK Laser Iridium Spark Plug is our flagship product and NGK latest innovation. It combines the longevity of iridium with the consistent nature of platinum and consists of a fine-wire iridium center electrode coupled with a platinum ground electrode, allowing for a longer life and consistent performance over a long period of time. The NGK Laser Iridium Spark Plug has been especially useful for modern turbocharged and high-efficiency engines.