The XT PPP runs about 252bhp from memory, so your aim is very achievable.
A chap I know has a 2.5XT running 340bhp. 18 months on and still going strong... albeit with new head gasket!
subaruforester.org is worth a look at, particularly the Europe section. Between them, the guys on there know most things.
Oh, and the XT exhaust is a four piece, STi a three piece (similar to the classic). The standard STi system is hard to come by and not much of an upgrade, so I shouldn't bother. I do have a STi backbox you would be welcome to if you wanted to try it. Pretty quiet!
Last edited by Banstead Stig; 11-06-2014 at 09:29 PM.
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