vw bus auxillary air regulator
This spot can always be a hasel. First it not all that easy to get at. These vacuum lines deal with the auxiliary air regulator. The elbow on the passenger side which leads up to the s-boot (<a href="http://calivw78.com/v/parts/vacuum/auxilary_air_regulator.jpg.html">larger image here</a>) is not in too bad a shape thankfully.