i've got this muffler, not sure what it is, but i got it at a swap meet for $20. some sort of harley aftermarket for probably a dyna. bolts right on (though should have a reduction collar on the header), sounds great, gets lots of complements, straight through but with a scoop baffle for good back pressure.
http://sphotos.ak.fbcdn.net/hphotos-ak-ash2/hs049.ash2/35790_596576174760_359...wrapped the pipe too. cheapest i could find off ebay, 30 ft but used about half that. sanded and sprayed the header w/ bbq paint first to protect from rust.
i also have a stock dyna muffler (i think) that i might sell. bolts don't quite line up so would need to make a simple extension. nothing a saw and drill couldn't do
can you PLEASE tell me about your seat and fender set up and tell me how i can do the same!!