High Output N/A engine for Forester

[HighoutputFozzy]

Hey guys, I have a 2009 Forester that I want to make a circuit car by building a high output naturally aspirated engine attached to either an STi 6 speed manual or the STi 5 speed with the same 4.44 final drive ratio that my current rear diff has. The car has not undergone any major upgrades other than aftermarket drilled and slotted rotors and a K&N high flowing filter. I’m currently looking at putting Five8 industry’s coil overs, Meghan sway bars, and some BBS wheels that I’ve found but have yet to act on them; any and all advice is appreciated! Thanks!