The Tiger had two huge mufflers on its rear wall. In most versions of the tank, they were hidden behind sheet-metal covers. But, when you see the tank (or a model of it) from above, these mufflers are visible.
The mufflers were simple cylinders, but there was some complex equipment attached to their outlets at the top. It satisfied two needs; concealment of flames in the dark, and underwater operation.
This is the top of a muffler fixed to Tiger "131" in modern times. I have pointed out a hinged flap for sealing the muffler underwater, and a raised disk to deflect flames.
But the mufflers photographed above are not originals; they are "restorations". We can compare them to this model of the original design, recreated from German drawings.
The modern mufflers are visibly different to the originals in every respect; the size of the disk, the use of nuts instead of bolts, the size of the flap, the hinge and locking mechanism, etc. etc.
Genuine Tiger mufflers can be seen only in German and Russian museums as of this date.