Seems like a lot of people reply with comments such as "you will only need to do it if you are in the 10's" or something like that. This is true not only for this thread, but for all threads about "air". This is really no answer.
Someone who really knows about this stuff should come up with a definitive answer to the ALL of the "air in, air out" questions.
Maybe a one page write up over at
www.gnttype.org or something.
I am very big on the "air in, air out" way of thinking.
It would be great if someone could drive this all the way from air filter to tailpipe...
Where are there going to be "bottlenecks"?
air filter
MAF sensor - 3", 3.5", none(FAST)
turbo inlet bell
turbo outlet
intercooler inlet/dutweiler neck?
intercooler, intercooler and 1/2, front mount
intercooler outlet
up pipe
throttle body
plenum
plenum spacer/power plate
intake manifold
heads/valves
exhaust manifold/headers/crossover pipe
exhaust elbo
downpipe
cat/no cat
mufflers
tail pipes/dual/single