Originally Posted by Nrw
They work fine with just a pump. I've seen numerous 05's with a vf52 with stock injectors. Zero issues fueling wise.
Exactly. Most of those hitting 95+% IDC are doing so because either (1) their pump is failing to keep up with the injectors, or (2) their AFR is silly rich, or both.
With a little turbo like this you can get away with stock fueling. I'd recommend upgrading the pump alone. STi pump works well but if you think you might ever go to a bigger turbo or run E85, go with the DW65c.