Mines still got a carb. Being a Computer/Electronics guy I don't like PC's solution to remapping, it's clever but I prefer edits directly in the pcm, not a box that plays games with the signals going into the pcm to change things. But they are better than nothing, at least sometimes.
I've noticed that some of the dyno's with 2 into 1's get a little choked at higher rpm, so I've stayed with the stock 2 pipes with a cross over. I am going to get SE II's for it, open it up a little.