* For most engines (including many V6 and V8s): The fuel pressure regulator is integrated *into* the fuel rail. You won't find a separate, standalone component. The fuel rail is located on the intake manifold, near the throttle body.
* Some older or less common engine configurations: In rare cases, there might be a separate fuel pressure regulator, typically mounted near the fuel pump or on the fuel line. This is less common for a 2002 Ram.
In short: Unless you have a very unusual engine setup, it's almost certainly integrated into the fuel rail on the intake manifold. To be absolutely sure, you should consult a repair manual specific to your vehicle's engine (e.g., 3.9L, 5.2L, 5.9L). A visual inspection of the fuel rail itself is also recommended.
