The only concern I have with not using teflon tape is brass is such a soft metal, I would be careful on how tight to make it. IMO. But if it works without it then I would think it should be ok.
I have always been told NOT to use teflon tape on brass fittings. Brass is soft and seals itself from what I understand.
Glider, What is your recommendation for a replacement oil temp gauge on a 09 Ultra.
:eam