1BADAD I've got some info saved in a document for PM question. (Yeah, not the fastest typer) Hope it's OK to throw it up here.
If not yell at me and I'll edit it off.
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First of all got the idea from Danny (hardone2get) who was the first one I saw do this. His setup was with freedom pipes. He sent me pics of his setup and "How-to". So special thanks to him!
The exhaust on my Roady is made up of Bassani Head Pipes they come with brackets for their own mufflers. I used their brackets and modified the stock Roadstar mufflers to fit to duals using the TOP muffler off two sets.
The Bassani head pipes leave the mufflers stick out past the rear fender. I shortened the pipes by about 1 1/4" to 1 1/2". For some reason slightly more from the left side than the right to make them even at the fender tip. This also makes the heat shields longer as they are not cut and they slide back into the stock muffler front cover hiding the slip joint.
Some pics with notations in a photobucket album here:
http://s475.photobucket.com/albums/rr111/rphazen/Roadstar/Roadstar%20Exhaust/
I like the sound but I really wanted a quieter system than a lot of people might want. I had drilled out the stock mufflers to a stage 1 before I went to this exhaust. So there is a little more rumble than stock.
I think with the Bassani head pipes they are not louder but deeper (lower tone). Hard to tell for absolutely sure from December (the start of "mod season"

till March when I wrapped the mods for the season.
I hear other bikes pull away from a light with considerably louder exhaust and I cringe. Just too loud for me. Getting old and wimpy!!!
Another option would be to find a set of Harley touring mufflers. DocShadow is working on that. They would slip on to the 1.75" Bassani pipes and then hang them with your own mod. The HD touring mufflers are bout 29.5" long. That's about 1" shorter than the Roadstar muffler with the new slipjoint welded on. The HD mufflers are usually pretty cheap on ebay. I don't know how to drill the HD mufflers, guess we would have to check out the HD forums for that.
Some discussion about HD mufflers on this post:
http://roadstarclinic.com/component/option,com_fireboard/Itemid,187/func,view/id,392923/catid,49/limit,10/limitstart,0/
Probably too much info,
Rod