All I know is on the stock headers every time I've attempted to weld on one it cracked within 6 months of my repair...
Hopefully Banks will warranty it... How old is it?
I forget who's header @Woodrow has now on his. Don't remember if it was him or another member who had a Banks that had cracked like that also.
I had a JBA header that I bought with my golen stroker and that cracked at the collector. I did not ceramic coat that one, but I was using heat wrap. I replaced the JBA with the Banks revolver, which I had ceramic coated and did not use heat wrap and so far so good.