FMIC tubing size

[tutulate]

Given that the stock SVO turbo outlet is 2", and after reading the FAQ section, I still have s couple of questions. I understand the difference between 2-1/2" and 3" is negligible with lower HP goals, but what about 2" tubing? How restrictive is 2"?
I have a Neon FMIC that has 2" inlet/outlet. Would 2" piping be enough for a limit of about 300HP? Would there be a gain in using 2-1/2" tubing and reducing it at both sides of the intercooler? For the future, would the 2" tubing be ok performance-wise with a 6258EFR?

[Stinger]

Most likely the core and/or end tank design will be as much of a concern as the tubing size. If you were going to use an 2" intercooler then ideally you'd do 2" to the IC and 2.5" to the throttle body.

[tutulate]

Ok. That makes sense. The end tanks are curved-shaped cast aluminum that turns the ends 90*. The Neon they came off of was rated at 230 HP. The core is 18.5x8x2.25.

What I may do is change the outlet from 2" to 2.5" and get rid of that 90* bend of the tank. That will make it easier to fit around the SVO radiator.