Cheap headers...
If it makes you feel any better, I bought a set of Dougs a few months ago, when I got them the box was beat all to crap and the headers scratched up.
I said screw it and kept them.
The best one was a bought a pair of MP composite head gaskets years ago, some dip-**** at Summits warehouse, folded the gaskets in 1/2 so they would fit in a box, yeah those went back.