I get that too... why put the exhaust on if you aren't going to tune it. I am, just haven't found an AccessPort for sale yet at a price I'm willing to pay. Got the up pipe for basically free when a friend built his car and ended up using an STI one, and the downpipe was bought on here for way cheap. I spent more on gaskets, downpipe/catback adapter and a Grimmspeed turbo heat shield than I did on the two pipes.
I'll buy an AccessPort when I find one. The question I'm asking is why can't the car regulate boost with these mods when other cars can.