no input on the mustang I only have the ford racing headers. no opinion on them. they were cheap and I wasnt gonna put the stockers back after they were off.
I did get a nice set of Stainless steel headers for my wifes traans am. made by Stainless Works, and they were very expensive. I'm sure I got ripped off on that whole project but they are very nice headers, only a little blue-ing near the ports after a year or so of use. Got those because they were the only performance headers made for the car that retained all the emmissions items.