What happens when pulling 160A out of a busbar rated at 100A?
What happens is you exceed the rating of your buss bar by 60%. Doing that is not a good idea and you could melt/deform the base of the buss bar. That buss bar would heat up very fast with that much load on it in a very short time. After 15 minutes it would be so hot it would probably start melting the insulation of other wires attached to it. Plus, I'd be cautious of electrical items purchased on Amazon as they tend to be counterfeit items and could lack UL approval. Bottom line, get a higher rated buss bar.