yes...a dremel would work....but you would be sitting there for awhile. the subframe isnt that thick right there. just make two cuts in a v shape....then bring a screwdriver/prybar and you should be able to bend the v shape flap downward. there is a hole already there but it isnt big enough to fit a 17 mil wrench in to grab the rusted/welded nut. so that flap is critical...you dont wnat to go to big otherwise your basically cutting your subframe and it weakens the structure by cutting. a 17 mil nut is on the other side. good luck...any other info?