I'm new to driving the Wrx, and just recently got into automotives and what not. I hear the Wrx's stock uppipe isn't great for the turbo, and my car is a 2003 with 120K, I figured it's time to replace it to be safe. I do have some questions though because I'm not sure if the owner before me put in a new uppipe or not, he did change the exhaust system and tires so I wouldn't be surprised.
1) How can I tell if the uppipes stock or not, if I even can?
2) What's a good brand/material for the catless uppipe?
Again, I'm new to this, help would be appreciated!