Vance and Hines dual exhaust question?

[jtascone]

Hi all. Anyone know if the V&H K615rc and K616rc mufflers are the mufflers that go with the true dual system from V&H, or are they slip-ons meant to be used with the stock header pipes for the 1500 Nomad? I have the full V&H true duals on my 03 Nomad 1500 and found a set of these on Craiglist but I don't want to buy them if they are made to just slip on the stock headers. Thanks to anyone that can help me!