Well after sitting in the Hub at Ohio for the last 3 days they finally started moving this morning towards this way...
Honestly I'm hoping they just bolt up to my existing exhaust where my old headers are...
They probably will bolt right up. Like I said, you are better off NOT necking the pipe down right at the collector if you are not running 3 inch exhaust. 10-12 inches of 3 inch before you neck it down is a pretty good boost in the torque curve at launch and the gear changes. It may even want a bit longer but that's a good starting point.