Hi
I recently bought a 2003 WRX hatchback from a private non-subaru dealer, the car has had 2 previous owners, the dealer told me the only modification is a Mongoose exhaust, the car feels a lot faster then standard WRXs with just an after-market exhaust that I have driven, I suspect it had a Prodrive Performance Pack fitted, is there any way of telling without going to an official Subaru dealer? The other hint is that there is a blue tubing with "Prodrive" label somewhere under the intercooler, as you can tell im not a mechanic pundit.

 

You wont be able to miss the intercooler piping if its fitted, its blue and as your looking into the engine bay its on the left of the intercooler at the front.
You should also have a certificate with the documentation saying the PPP has been fitted
The other way is to go to a dealer and check against the chassis number as it will state if the car has had an "official" PPP fitted

Tony