Just like Mark Craig said "WD-40 the rubbbbbbbber hangers""just joking Mark". Make your cuts in the exhause before removing it from the hangers. Use a long screwdriver or a pry bar to slide them off the the metal post. When you put the exhaust back on start at the turbo and work toward the rear. You may have to cut the exhaust to length, so fit the tail pipe and muffler first to see how much you need to take out.
Thanks, Brad