which is the impreza to tune retaining the std turbo over 300 Hp??
 

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I'll answer anyway. All OEM turbos EXCEPT the smallest TD04 should make over 300bhp. Some are capable of up to 350-360 (VF43). Various models will make anywhere between 300-360, with most residing in the 300-330 bracket...

Even the TD04 equipped engine can just about be dragged kicking and screaming to 300bhp, but the expence is probably not worth the effort.

Simon

Indeed ;)

I was gonna mention that as a footnote, but figured it was very much the exception, than the rule, etc... ;)