The internals of Emgo mufflers are very simple and easy to modify, either louder or quieter. The trick is how the muffler, in whatever form you end up using it, works with the rest of the intake/exhaust system so you don't mess up the power band. At mean, I assume you want decent power and smooth delivery along with your cool sound.

The problem is they will hit your rear brake lever.

It's theoretically possible to shorten them, but it would be only slightly less work than building from scratch.

Emgo has a 17" reverse cone megaphone. Part number 80-84030.

ok Thanks for all the great advice, but just to be certain the Dunstall or the megaphone will make my bike louder.  i just might have to worry about it hitting the rear lever which can be solved with the 1 3/4" pipe with a 7 deg bend?

I installed the shorter EMGO reverse cone (http://suzukisavage.com/cgi-bin/YaBB.pl?num=1250720204/) and didn't have any problems with it hitting either the brake lever or the rod.  It worked perfectly with some shims made from a diet coke can and some high-temp muffler cement stuff.  Getting the old muffler off was the hardest part.  I hadn't worked on the bike much at that point and it was a pretty easy install for someone with little experience.

It made the bike MUCH louder though, so be sure you want that kind of volume.

Biggest thing to keep in mind with Emgo is the chrome is some thin, soft, cheap crap. Most chrome cleaners will scratch it.

I painted mine with high temp (BBQ) flat black 10 years ago.

Hope you like the rotor sound of a Huey UH-1D... packing doesn't last very long.

OK well I ended up buying the EMGO Megaphone slip on, now the problem is how do I get the heat shield off?...I see one bolt that seems like the only one holding it on but when I took the bolt off, the shield didn't budge.