Injectors id1000s they are awesome plus plenty of room to move if you want to go flex fuel/e85
Fuel pump, Nismo worth the money
Coil packs, like Sean said, only if they need replacing, I went spitfires never been happier
Catch can, I went the Nismo set up route, is an awesome bit of kit, race pace do one too
Computer, can go trustee power fc or go vipec
If you want more then 300kw you will need new AFMs either go Z32s or Nismos
Clutch will need to be looked at too