Yea
That be the engine block
But, like 4get said, a good aluminimuminumminn welder should be able to weld the busted part back on, or, weld a clump (official welding term) in there and then tap it.
or make a new muffler bracket and attach it somewhere else
I would say that bolt on the left, but that looks like a drain plug
let us know what happens
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