buick regal 2000 v6 3.8 supercherge on 2000 Buick Regal

when accelerated to hight speed it loose almost all power is hard to pass other cars on the freeway i don't know what to do please help

Asked by for the 2000 Buick Regal
poss plugged fuel filter or restricted exh system.
what could be the restriction on the exh sistem