dsc46467.jpg

Various views of the regenerative cooling tubes making up the engine's thrust chamber.

Picture 1 of 7.

View of the white covering over the combustion chamber. Note that the regenerative tubes bifurcate (split in to) just aft of the white covering (see dsc46476.jpg for a view of the bifurcation point on the interior of the thrust chamber).

The only other common engine of which I can think whose regenerative cooling tubes bifurcate is the Saturn V's F-1 engine.