The OP could have done a search and in the future probably will, but in the spirit of Thanksgiving Weekend here is what my 2010 STi turned out.
No mods 240 hp, tq 250(can't remember exactly, no access to sheet now, but close).
Now, same dyno, 410hp 419tq
Invidea catted dp
Harmon Motive axle back
DW 65C fuel pump
ID 1000 cc injectors
air pump delete MPS flange blanks
composite TGV delete housings
AEM EBC valve
Cobb Accessport Protuned Dom at MPS
Most was installed by some wannabe snowboarder/downhill mtb'er, named Dave.