This is a rear brake parts kit that will work with all Vanagon that were ever sold here in the USA. The kit includes a pair of rear brake drums, rear brake shoes, a pair of rear wheel cylinders, and a set of rear brake springs. This should be all of the parts that you would need to do an advanced rear brake job on your Vanagon. The rear brakes are the same on all years of Vanagon even the Syncro.
There is a super rare 16" Syncro version that was sold in Europe. If you happen to have that version, first of all, congratulations! Secondly, good luck finding rear brake parts because I don't have drums or pads and I have no idea where you would get them.