I have run 3 different mid pipes on my 96 cobra. First one was a
BBK O/R X-pipe with 2 chamber flows dumped, this combo was the worst I have ever heard on a mustang. It sounded like I had cans rattling around in my exhaust. I then took off the dumps and went with the american thunder catback. This combo still had the damn rattling can sound just not as loud. I then took the BBK X-pipe off and went with an BBK O/R H-pipe. I loved the sound with my
flowmaster catback, not too loud but had a very deep agressive tone. I then switched to a 99 cobra motor and had to get another new mid pipe so I went with the VRS O/R X-pipe. The car is loud as hell, it is a little raspy, but it just screams at WOT and I like this combo the best.
The BBK X-pipe I lent to a friend with a 98 Cobra on a trial basis knowing it would sound like crap. He put it on his car and it still had that horrible rattling sound and he even had the stock catback. Long story short that BBK X-pipe still sits worthless in my garage and my friend runs my old H-pipe and 2 chambers dumped and couldn't be happier.