that on an axle back looks like? shouldnt be a hard fix, use a ball peen hammer, slowly work it back round, one my Pypes long tubes arrived like that, I fixed it, has not been an issue leaking at all, been like that almost 2yrs now
I banged it a few times even though I couldnt really see a difference but I went ahead and installed it. Fit perfectly and zero leaks.
Doubt it would cost him anything to return them, depending on who he bought them from.