I was looking through Ebay and I find this
http://cgi.ebay.com/ebaymotors/86-92...QQcmdZViewItem
I tought I had a stock exhaust, but this one I found is just like the one I have in my car, so I guess its aftermarket. The one I have looks new but I would of never thought it was aftermarket since it sounds real real crappy. (I guess Monza exhaust's suck)