The deal's done. Here's the 411:
I went with the round Borla tips for a 94-95 Mustang. They are about 3" in diameter. They attach to an aluminized 2.5" pipe from a Dynomax kit for a 94-95. The aluminized pipe is showing and it looks really crappy.
I ALREADY had a nice 2.5" dynomax system with stainless piping. Unfortunately, the new panhard rod was interfering with the exhaust. So a custom exhaust had to be rigged to clear the panhard.