Alright, this might start up an arguement, but I've heard all sorts of shit

Say in my case, right now I have a stock 12A turbo, stock IC, and hard pipes that are 1 3/4" - basically stock cloth side, only hard pipes.

Now, a lot of people upgrade to 2 1/4 or 3" pipes, saying they get more HP etc etc that it'll flow more. Is that true ( with a stock turbo ) or just total BS.

I was to understand that was you want as even of sizing as possible. My turbo outlet matches my IC pipes which match my IC inlet/outlet which matches my throttle body inlet - thus keeping up air velocity and minimizing pressure loss... i think