Jet Hot is the shizit.....
I did my headers with Jet Hot a few years ago.
they arrived Black from Summit and then I sent them to Jet Hot and they came back a cool Chrome color.....looked sweet....
but unfortunately, didn't make enough progress to install them and test them out. I had to sell them, since I no longer needed the back output pipes.....going with side pipes now:s, and when I get those they will be Jet Hot coated too.....
price was about 200-250 with shipping and all, but it was a VERY professional job.....
never thought about using POR on that though.......I just check their web site, cause I'm fixing to POR my frame, and the have a hi-temp engine POR application, which may better be suited for that.
if interested, try
www.por-texas.com .....they got some kinda going out of business sale or something going on right now......prices have dropped a few $$$......
let us know if you do try it and how it works, but I would prefer JET HOT, but it is substantially cheaper for the POR stuff, and they do also make a Sterling Silver too....
Dave