Yeah, never seen that can before. From browsing other posts it seems the D&D slip-on is loud and other owners are pleased with it. Like I said, I just put on a KERKER slip-on and it works well. Maniac also had a KERKER Supertrapp can.
You probably won't know until you install the pipe if the carbs need re-jetting.
The Bandit pipe diameter I believe is 2", or 51mm.