The stock style mirrors do only require 2 bolts, unfortunatly the monkeys that previously owned my truck were kings of half-mule work. Instead of just replacing the stock mirrors they swapped them to an aftermarket cheepo and mounted them using about four or five different fasteners. I know get to do some poor mans body work to cover all of the holes in the lower set, I was able to use or cover all of the upper ones with the new mirrors.
