Thanks to those that replied. I talked to Russel at Russeleri and he is going to do the diaper with a heat material that will go over the corner of the diaper near the oil pan. It will withstand heat up to 1200 degrees. I also intend to attach a small thin piece of metal against the header which will act as a heat shield to the thin material in that corner of the diaper. I will let everyone know how it works.