So I'm thinking my next step in WRX modification will be a bigger turbocharger. Now my questions about supporting mods begin. I'm thinking of upgrading to the vh39(?) so my mods would include 600cc injectors, an STi intercooler takeoff or Godspeed, and a Walbro fuel pump. What's everyone's opinions of those mods? I'm stage 2 right now so I have a 3'' turboback, tune, and intake (i know that's not needed). Also going to heat wrap my downpipe because I hear that's good.
Any and all constructive advice welcome. Thanks!