I've used Jet Hot for everything with never a problem. I won an HPC coating job at an NSRA meet and had an intake and a water outlet done. That coating was dull and they trashed the outlet. Jet Hot did the intake over plus my new outlet and did it right.

Jet Hot headers and intake on a different engine then above:

http://i70.photobucket.com/albums/i8...DSC_0050-2.jpg