The Boeing EA-18G Growler shares over 90% of its characteristics with the Boeing F/A-18F Super Hornet. They are both built at Boeing’s St. Louis, Missouri assembly plant, the most extensive Boeing assembly line after Boeing’s Everett, Washington facility. Focused on defense, the St. Louis plant also builds the MQ-25 Stingray aerial refueler and the T-7A Red Hawk flight training system.