ah ok unlike the butterfly one that end up being a problem the doug's uses a different leak free system, I really like the idea .
That; and I'm already running a mod'd set of Doug's tri-Y headers on the Crown Vic; so I figured I would get the matching cutouts. Running cats on that car too; but I had to get smaller mufflers than I originally wanted to run. But, it's not my car; and the owner wants the car fairly loud.
When I do the '05 MGM exhaust; I'm going to use the leftover Dynomax mufflers from the CV. I made the tails up in the basement and just have to get the X-pipe and Stainless Works longtubes w/cats. I have a couple gawdy resonated exhaust tips from the late '90s that I will use in an attempt to minimize drone. I hope the car will be quiet with that system.