The Chevelle’s intermediate pipe section was a little too long to use under our truck, so we cut the mufflers out. To reuse them, we cut them past where they had been welded into the system, but had to remove the sections intermediate pipes still stuck in the case. We used an air chisel to deform the pipe enough to grab it with pliers and pull it from the case. This took a lot longer than we thought it would and would recommend replacing the mufflers with new ones. You’ll see why later.