I was reading how someone repeatedly filled their header with water, froze it in the freezer, thawed it , refilled, refroze, etc, in order to remove a dent. Basically, fill the pipe with water, center the dent in the water, freeze for a few hours(overnight worked for me), thaw with hot water, refill with cold water and refreeze. It's that easy and it worked. I figured this was worth a try since it was free and found out it really works!! I had a pretty nicely collapsed header pipe that is now much much better. I just thought you may want to try it before spending your money.