To get mine off, i used an die grinder with a cutting wheel, and cut where the pipe starts to go straight back under the truck. I then loosened the band clamp, then i had my brother take a dead blow hammer and hit the pipe where i cut under the truck while i was up top holding the pipe from falling.
When he hit it, it seemed to jar the clamp loose off the turbo and it fell right out.
Hope this helps!