I have a question for h/t.. Do you think there would be a restriction in airflow, if say your running a turbo with a 3" outlet, and your intercooler hotside is 2.5" then goes to 3" on the coldside going int the t/b..

 

if the turbo has a 3" outlet it should be running 3" charge piping, thats a pretty big turbo so the air flow is there, unless its an ebay pos with a huge housing and small wheel lol

 

Its a precision billet 67 h housing, I/C is a dual backdoor, but the hot side is 2.5" and cold side is 3"..

 

if its a backdoor intercooler there shouldnt be any charge pipes, really just a small piece or even justa coupler from turbo to intercooler and tiny bit i dont think would make much of a difference, but i could be wrong. You could always open up the FMIC and weld on a 3" piece