I'm going to install an American Custom catless header pipe on my 2011 Ultra. My bike now has 500 miles on it. Should I replace the exhaust gaskets? The original stock ones seem to be in good condition. Any other advise on installing the header?

 

You will be right to reuse the originals, IMHO.

 

Good mod there. When you see a cat, you can only believe that they hold so much heat in your pipes with all that restriction.

 

Thats what I did with 1300 miles.No issues.