All you have to do is buy an H-pipe and brackets. It is not a bad purchese. You can modify the pipes to go under your bumper like pre 99 GT/Cobra. Or you can buy a new rear bumper with the two holes already cut out. MAC sells h-pipes that run about ~$150. I have true duals on my V6 and it sounds decent.
http://www.killercobra.com/gallery/audio/
Go there and then go to Josh's 1994. It is a sound clip of my 1994 V6. Gives you an idea what it sounds like.
I hope I answered some questions. If you have anymore please ask.