Ok guys basically i wanna know if i can just swap my stock turbo of my 04 for another stock wrx 04-05 turbo without a tune?? I only ask since my turbo is dying or dead doesnt spool i had barry and rich at wrench worx confirm it when they drove it as it wouldnt spool as a normal turbo would. That can also explain the 5-6 psi lost a close to a year ago. stage 2 i have the vf 39 sitting at home just needing injectors and fuel pump since i already have all supporting mods that need to go with it just saving for a new place at the moment but would like to feel the huge difference im sure ill get just swaping it. Sorry for the long post.