My 06 spec D has prodrive wheels & suspention , what other signs can I look for to see if it is a genuine prodrive? If they did even do one on the spec d, and no I'm not sticking it on a rolling road to see the bhp lol, rear box is a fog horn btw

 

No such thing as genuine prodrive.
It was just an add on at point of sale

 

The dealer may have put a silver sticker on your drivers door pillar which should tell you if the PPP was fitted or its just a standard WRX STi.

Otherwise you may have to approach your dealer as sounds you don't have the PPP backbox.

 

Think the back box my have taken off in favour of the fog horn type ,but now I've been told that all spec D's were PPP fitted so even more confused lol

 

No they weren't:

http://www.autocar.co.uk/car-review/...wrx-sti-spec-d