With band clamps, you can do that in a matter of minutes. Oh BTW, if your band clamps ever get loose from stretching, like mine have in the past, Ive used regular foil to wrap around the "joint" several times, then put the clamp over it and tighten. it will get tight, stay tight and no leaks. The foil conforms to the joint and seals it very well with the pressure of the band clamp.

I came across this when I changed mufflers several times as I was searching for better sound. This trick works very well. It beats the hell out of u-bolts.