There is no PFC for your bug eye, the last Subaru
ecu they did was for 99-00 version 5/6 Sti/Wrx.
Your options are:
1. Verso Tune (Flashed onto your factory
ecu) - All Star Garage
2. Ecutek (Flashed onto your factory
ecu)- Maximum Motorsport
3. Vi-pec replacement
ecu - All Star, Evolution R etc
4. Link
5. Autronic
6. Motec
I had Power Fc's for the last 5 years, I now have a Vi-pec and wouldn't go back.
Vi-pec has Anti-lag, launch control, MAP sensor based etc, etc.....
You'll be needing at least 750cc injectors to run E85 & still have headroom for future mods.