What are the pros and cons of each setup?
Wouldn't a re-routed o2 dump back into the exhaust be the best way to go for sending all of the exhaust right out of the muffler?
From what I have read, it seems the drawback with the external is that it would be loud as hell.
I found a 3" turbo back (after the o2 housing) exhaust with test pipe pre-made onto to bypass the cat for $180
Then at another site I found a full 3" o2 eliminator/downpipe/test pipe (internal o2 or external) for $400
What would you get?