I'm interestd in getting a up pipe for my GS500F. And is just curiouse to see what's good for my bike. Something not too loud but enough to let them know that I"m coming. and a little boost in power won't be bad either. Thanks!
Check it out!
http://cgi.ebay.com/03-05-Z1000-dual-gold-exhaust-pipes-original_W0QQitemZ4590182408QQcategoryZ35231QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
These may or may not work for you depending on how much fab work you can do but I think I saw a picture of a GS with one of these installed.
Try this... :dunno:
http://gstwins.com/forum/viewtopic.php?t=22560