PB Blaster, maybe a little heat from a propane torch, 24" breaker bar, a big arm, maybe some help. Any one of those or combo of them. I'm a little old fat man so opted for the 24" breaker bar and had them off on no time. 2 bolts on the top of each frame rail and one underneath. Both bolts are big 'ole torx bolts so to make it easier replace them with grade 8s from HD or Lowes and use antiseize on the new ones.