Fitting the OEM Auxillary Heating Ductwork

[eugene]

Okay, to explain what's going on: The original VW heater outlet is 90mm (intake is 75mm btw).
The D2, St2000, and 2kw Planar/aliexpress heater outlet is 60mm.

To connect the 2kw heater to the original b-pillar ducting you can do the following:

2kw heater -> 60mm flexible metal duct (usually supplied with the heater) -> 60/90mm adapter -> rubber part of the VW duct.

The Webasto adapter part number: 9011011 / 1320760 / 9011011C / 1320760A

 

[oldiebut goodie]

OEM Webasto Air Top 3500ST was 90mm inlet the same as the outlet not 75mm.
OD 90mm, ID 70mm:

 

[Goloopy]

Can anyone confirm the correct part number for a B-Pillar Trim Cover to suit a Caravelle in black, I have searched everywhere and really struggling. standard part number below for reference

• B-Pillar Trim Cover = 7E0 867 292L 92W