94firebirdguy05

i want to get new headers and there is some kind of emission tubing on my stock exhaust manifold. What is it and how can i remove it. Another question any ideas where i can get a cat or somewhere i can get a cat with two sides with a 3 bolt flange and a straight pipe the same size. i want this so i can put the cat back on for e-check, and put the straight pipe for dragging at the track.