Gas Regulator
WARNING: This page is about a different car, the 2004 Ford Pickup Heritage. However, it is still accessible from the selected car via links, so may be relevant.
High pressure CNG enters the high pressure regulator from the CNG fuel tank. The gas regulator delivers fuel at approximately 724 kPa (105 psia) to the fuel rail solenoid.
Courtesy of FORD MOTOR CO.