Thanks for all the replies!
The car was bought in Bristol as a fresh import. The rest of the car is as a WRX V-Ltd should be, but it does have STi 6 cosmetics, including rear wing, fog light covers and front brace. I would have thought painting the manifold red would have taken quite a lot of effort (especially as lots of the paint has flaked off in typical fashion!) and the intercooler is normal WRX black...