Pfft....out parts department tries to push us around all the time. Especially when it comes to using old parts versus new released stuff, such as stainless manifold fasteners, intake bolts with black rubbers instead of green rubbers, and so-on. It's always a fight that I could do with out.
Another thing they like to do is leave extra quanities on the ticket or parts that were oredered that I did not request. I bring the new part back and they say they are leaving it on the ticket. I say go ahead. It always sorts itself out when the advisor is wondering why the bill is 300 bucks over and beyond.