can anyone tell me whats an FPR?do we really need a fuel pressure regulator? correct me if im wrong, doesnt the PC3 usb advances the stock pump's fuel pressure?

and please, if anyone can.. kindly post me the correct info/dyno of the

1. ignition module.
2. pc3 usb.
3. wideband commander
4. fuel pressure regulator.

all seperate.


thanks