Does anyone know the specs required for the Vanagon coolant and fuel
hoses? That is max pressure in psi and max temperature?
I have found a manufacturer of hoses (Parker) that would be a less
expensive source than VW,  but I need to know the specs to determine which
type of hose is suitable.

Incidentally one of the VW hoses that I recently bought was marked "Avon,
England", so everything that goes into a VW is not German.