Where is the fuel pump?
 

Ok, Im no mechanic! Can anyone tell me where it is (MY05 sti) and how to tell whether its a prodrive one that was supposed to be replaced with the ppp. Thanks in advance.

its under the rear seats

It's in the tank on Classics, is it not the same on newage?

In the top of the fuel tank, accessed via a small pannel in the floor, accessed by removing the rear seat.