Be aware someone bought one of those and had to jump thru hoops with the radio manufacturer because the XM and radio have to be compatible. I remember reading thread they had to pull radio and send it off to reprogram it or something so it would work with the add-on.
Usually see them sell for $400 on Facebook market but it's been a while since I've seen one.
Found the thread, I ran across this when I was looking into maybe getting XM. Decided wasn't worth the hassle to buy and it might not work.
I recently bought a used XM radio adapter from another Victory rider with the understanding that it was "plug and play". Lots of folks on the Victory Owners Group on Facebook said it was so. Well it isn't. The 2016's radio doesn't automatically detect the XM receiver and Victory dealers can't...