Do NOT remove the Cat. Your 93 has no factory resonator, and it will be WAY too loud and raspy. Replace the cat with a performance cat, and then the muffler of your choice.
The car you hear in this video clip is mine http://d30020701.purehost.com/pdad/scream_1.mpg
with the high flow cat, and Magnaflow muffler. 2 days later I added a resonator (magnaflow) to take the rasp out. You hear my Green 93 SSEi out the camera-woman'* window....video shot by PontiacMom, PontiacDad driving the camera car......2000SilverBullet and driverjohn2005 in the background).