Ok, either I am on crack or I am just retarded.
I was taking a look at the exhaust on the car, and something just isn't clicking in my head.
If you look at the engine you can see where the down pipe connects to the header, so follow it down from there. I see the bend and then what looks like a cat, connected at the end of the down pipe. Then at the end of the cat, you see the next connection point for the rest of the exhaust. About a 1' to 1.5' down there is what looks like a miniture cat, then on to the muffler from there. However, looking at the "second cat" I am not seeing any bolts to just take that part off, it looks like it is all one piece. If that is where the R.T. cat is connecting, then how do you get it to connect to the front end of the exhaust after the cat, if you have a N1 dual connected to the rear.
Also, if the N1 connects at the end of the "second cat", then it really isn't that long for a catback exhaust.
Tell me I'm retarded <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/dozingoff.gif" border="0" valign="absmiddle" alt='

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If any one has pictures of the underside of their cars with the N1 dual installed that would very helpful.