The U.S. Defense Security Cooperation Agency, in its required notification to Congress, said the FMS would include associated equipment, parts, training and logistical support.
"Saudi Arabia needs these aircraft to sustain its aging fleet, which faces increasing obsolescence," DSCA said. "The proposed sale of C-130J and KC-130J aircraft will provide a modern configuration, improve reliability and enhance the Royal Saudi Air Force's ability to effectively field, support and employ these aircraft."
Included in the package would be 120 Rolls Royce AE2100D3 engines; and 25 Link-16 multi-functional information distribution systems.
Lockheed-Martin, General Electric Aviation Systems and Rolls Royce would be prime contractors.
The agency said U.S. government and contractor representatives would be needed in Saudi Arabia for an undetermined period of time for delivery support, system checkout and logistics.
"This proposed sale of C-130J-30 and KC-130J assets will contribute to the foreign policy and national security of the United States by helping to improve the security of a friendly country that has been, and continues to be, an important force for political stability and economic progress in the Middle East." DSCA said.