Here are some photos of my new Flowmaster setup. We eliminated the rear muffler and replaced the front unit, routing the exhaust high and hopefully out of the way of those tail-dragging obstacles. It's definately louder than the stock setup--a nice rumble at idle, loudest at midrange, then quieting down at the top end.
I haven't had it out on the highway yet so I don't know the sound level cruising at 65 mph yet.