Ok, eventually I want to upgrade to like a 20g turbo or something, and from what I hear the injectors are much bigger for the 06's, and they are blue as opposed to pink. Not important :P but anyway, I don't know the exact size of the new injectors, but I do know that these are the injector duty cycles for the 2006:

1500 9.1%
2000 14.6%
2500 28.4%
3000 38.6%
3500 48.1%
4000 56.5%
4500 62.2%
5000 64.7%
5500 65.9%
6000 67.7%
6300 69.6%

Now considering that before, wrx's were aparently hitting like 98% IDC, this obviously leaves me quite a bit of room...I would assume that along with the larger injectors, I would also have a fuel rail and fuel pump that could support them? Do you guys think that I would have enough room to stick in a 20g and not have any issues with IDC? It would be very convenient if I did .

i dont know about the Suby's yet, but when i used to tune and work on cars, the golden rule was not to exceed 80% Duty Cycle if possible. Getting too close to 100%... one false calculation.. one small sub par injector and it might stick open and flood, or worse.. stick closed and lean out that cylinder and boom!

Yea I know :x

IMHO, no....although many have. Your stock fuel rail will be fine, the pump I would upgrade to a 255lph walbro, along with upgrading the injectors. The '06 injectors are only slightly larger than the pinks, not alot bigger.

Just for comparision I run UR785cc injectors on 93 octane & 50/50 meth injection w/ a TD05H-20G, my IDCs are around 75% w/ the meth injection. I do not remember the IDCs w/o injection.

Hmm, ok thanks