Originally posted by NavyBlueSubaru
well aparently the GFB doesnt...
Depends on how you adjust it and how much surge your turbo can take. I ran a GFB for ~2weeks. I got sick of cleaning and oiling it to keep it working corectly.
I did the mod to the stocker and never had a problem running a 16G ~23psi.
I have been doing this mod for the local owners here and they have had nothing but good things to say about it.