Or invest in a baffled sump if you're running very sticky tyres...
the killer is the long sweeping corners where the oil pick up gets starved
otherwise just drive slow
I've been running no BOV on my Gc8 for the past 4/5 months, no issues whatsoever with smoothness and boosting.
2nd Hand VF30 takes much more of a beating with antilag and is still performing well.
That said, I have a SARD blow off valve coming, to change the sound up.
*Edit* Also have Link, so no MAF.
Have you considered Blouch? Modern tech & sharp pricing depending on the features.
Only downside is the shipping from the US
http://www.bptstore.com/Subaru-WRXSTi_c_14.html
Original tune...
Model: GC8D
Displacement: 2.0l
Mods: Vf30, chinese semi tuned headers, link G4, 3" exhaust, fuel pump, fpr, split fuel lines
Fuel: Mobil 98
Tuner/dyno: E&H
Made 201kw at the wheels. Main limiting factor was the stock top mount. Have gone front mount, and booked for a retune next thursday, gunning for that 223kw (300 hp at the wheels)