I was thinking about putting the Greddy T-67 kit in my 02 wrx what kind of mods would i have to make to the car besides larger oil pump, injectors and ECU ?

larger wallet!!! j/k
your going to need a larger fuel pump and may be some other mods. imprezer has a T-67 on his ride. check out his car build up in the ongoing projects forum.

Larger oil pump? Where did you get that idea from? ;)

Of course, you will need larger injectors and proper tuning. You have to get a FMIC and GREDDY airnix too. Fuel pump too.

lol, sorry i meant fuel pump