Seanwrxwagon, thank you for making an effort to keep your spelling an grammar in line. We appreciate it and I wish more members took it seriously.
Anyway, The confusion here is related to the EJ205 vs the EJ255. The EJ205 responds very well to a bellmouth downpipe on it's own, even without any change in engine management. A good tune ALWAYS helps but the EJ205 runs great with just a downpipe. "Worse than stock" is not accurate. The car that has a problem with the downpipe mod is the EJ255 powered WRX (06+). Boost creep becomes a problem due to the greater exhaust flow and limited wastegate.
04 STi 16G powered lagless fun
04 WRX: SOLD