I remember when my son was a first year. He was in an honors section of Calc III. In order to be in the class the student had to have a 5 on the BC AP exam. On their first test, without a curve, there were scores in the 30s.
I’m not a fan of secondary admissions criteria, because high performing students in HS sometimes don’t adapt immediately to the pace and rigor of engineering at the collegiate level. It’s an unnecessary risk.