The engine is know to suffer from ringland failure. This was posted on my local forum by an owner and very knowledgeable guy.
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Subaru added the ECU re-flash/amended map to the 'service update' rather than doing a formal recall. The issue only occurred on some cars in some situations i.e. when you hit or got near the rev limiter, so a full recall was not considered necessary
Some updated cars (both standard UK STI & 330S) still suffered from ringland failure after the factory re-map, so a bespoke map from someone decent (like JGM) is still a must on the pre 2010 cars if you like to give it some and want peace of mind
My 08 hatch STI is making 370bhp and had been absolutely fine for 2 years/30K miles of spirited driving following JGM's fine work
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I own a Type Uk which has been PPP'd (Prodrive Performance Pack) which takes the car upto 330bhp. I believe this is the same mapping as the 330s. The main difference between a 330s and Type UK is that the 330s has Recaro seats, a starter button, Sat Nav and is badged 330s. These badge cars are all Factory cars. The type UK is the same car just without the extra options fitted.
The PPP is a dealer fitt option which is just a remap of the ECU. So not all Type UK will be 330bhp
When you do buy a car, take it to your local Subaru specialist and ask them to check the mapping on the car and if nessecary tweak it.