Flowmaster catback came in today. Very nice mandrel bends (unlike the stock system), aforementioned two-chambered "American Thunder" mufflers, chrome 3" tips. Kit advertised as '99 Cobra 2-1/2" (#17248, $309 @ brothersperformance) catback, however, the connection between the muffler section and tip section (only four parts and two clamps, total) is 2-3/4" on the smaller side...
I'm going to try my best to do a before-and-after dyno on Friday/Saturday...we shall see.
P.S. I just slapped these together for a quick pic, I didn't look closely at the hangars, so don't panic if the muffler sections are on the "wrong" side...lol