G'day Kyle. I don't know what the model the muffler is. It came with the bike and doesn't have anything on it to identify it. It's an oval shape, about 30cm long, 10cm high, with 3 ribs running along the length of the two flatter sides.
It doesn't have rivets to drill out. Instead it's got three small bolts up the front and two at the back. These do the exact same job that rivets would normally do. I would expect the canister to just slip off, but it won't. Maybe I just need to whollop it even harder?