This is NOS, you get both pipes     536365 fits hawks and sedans, it is replaced for 63-64 by 1561587 with cars equipped with  full flow and non spin on, side by side they actulally look the same to me, 1555717 is for c/k only,   these pipes are either nos or suppied by major exhaust company of time to the dealers , came out of Studebaker dealers
Due to size of the box most likely UPS or Fedex  but willing to ship however 
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