The quality of the headers will always be nagging at you, in the back of your mind, if you keep them. Plus, it looks as if they took a shortcut to fix a problem, instead of scrapping the whole batch (as has already been mentioned).
I'd send them back and go with something else. Just my $0.02.
Thanks for all the replies. I found a dimple in the chrome on the front heat shield. I'm going to contact BUB and see if they can ship me out some new shields.