I recently acquired a new pair of GPR Exhaust slip-on exhaust mufflers for my Ducati Supersport to use at the track. The previous set of D&D carbon fiber slip-on mufflers were really loud, and they didn't fit the bike as well as I would've preferred since they were originally for an older Supersport.
This new exhaust looks and sounds really good (not too loud even with the baffles removed), and they fit the bike perfectly. They are TIG welded stainless steel and small in size which I think gives them a little bit of a MotoGP look.