It dwarfs all of the other track because that track is the very bottom of the lift hill. On the far left side of the piece you can see the flange where the normal track connects to.
Then the huge portion of the piece (to the left of the guy) is where the lift chain drive system is housed. You can see the same design on B&M flyer and invert lifts like this one on Tatsu.
/3305.htm?p=15404 (add the neccesary RCDB site link before that as I can't post pics or links
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Then on the far right of the lift is where the lift track connects to. This flange is extremely large because the lift track will encase the lift chain return the same way that B&M flyer and invert lift track does.
The normal track size will not be this large, as can be seen by the connecting flange on the far left side of the piece.
EDIT to add: Also the cone shaped portion to the right of the guy is to fit into the support that will holding the piece up. For reference it will look something like Diamondbacks lift hill bottom support wise.