daniel p smith

i have been wondering why my car has not been hitting the boost i thought it should uk300 is my car,supposed to have ppp and got certificate to say it was fitted from new checked the ecu today not ppp one but 02 wrx written on it not happy at all. so i was wondering can i just plug in an ecu with ppp in it and will it run ok an also does it matter what year it comes from thanks alot,daniel