I had new Mufflers installed.

[1989 Tx DPS SSP]

I was getting a little tired of the Drone at highway speeds and with a Road trip approaching to Mustang Ok. for the Nationals, I wanted to do something. I was looking at Walker for something quiet but they only have a 2 1/4 Muffler and my old system was 2 1/2 Dynomax Cat Back. On Dynmax's Web site a few months back they were coming out with a Drone free replacement that is 2 1/2. As soon as they were available I placed my order. Summit was the only one that could come through in a timly fashion. Yesterday I had them installed and they do as thay say. NO DRONE !! You do get a little exhaust not when you get on it. But at Highway Speeds nothing. It sounds like a stock virgin Mustang. They do offer a 2 1/4 Muffler. In my opinion Dynomax offers the best replacement Exhaust system for our cars including the Cats. Provided you are not able to find NOS Stuff. I hope that they will offer this in a Cat Back kit but for now you will have to piece together the kit. Any questions PM me.
Here is the link.

http://www.dynomax.com/mufflers.php?muffler=vt