I have done it on a few after market 2t and 4t header pipes with good success. And no big deal! It is almost to easy. I am a plumber, bozos leaving garden hoses hooked up in the winter is a gold mine for me and an easy fix. On the exhaust pipes, the tape is the safety valve, it pops off. Now grant it, if the pipe has cracks or other weak spots you may have issues. The performance gains in getting them dents out overshadows the fact it may need to be replaced. Evilbay is a click away.