any V&H will fit as the 1200n has mid mounts so you could go for short shots with quiet baffles
the quiet baffles remove the rasp off the pipe and add abit of back pressure to the system - trust me when i say these things are LOUD, even with the quiet baffles
the heavy breather would be an awesome choice just get a good fueler to go with it and not the ECM reflash as you will still be lean