I'm going with the Ravin Z55's. $169 installed (welded). The manager at a local Midas does great work, and while he is at it he will install my Steeda Diff busings for $20. What a way to spend a few hours on Sat, huh?
I am wondering about options as the stock mufflers are a bit strange as they are offset in and out on the same side. Why not just run straight through center in and out. This will require moving the pipes though also. The choice of muffler is somewhat limited with the stock muffler configuration.,
Is the stock piping 2.25" or 2.5" on a Cobra? If it is only 2.25" then get an entire 2.5" catback. It gives the car a much deeper tone. You might even see some gains