What would be the purpose of such scoops anyway ?
The only purposes that comet to mind are engine air breathing  ( the air
it runs on ) or engine compartment air flow and cooling.

Way back , sure,  made some for a 56 Splitty Bus ....because all air
that enters those intakes ends up in two places..
Carb intake , and that all goes out the tail pipe.
And engine cooling ..and all that air is sealed and is forced to go
through cooling fan and cylinder fins then out the bottom and rear of
the van.
So scoops there could help.

a vanagon engine compartment is wide open more or less....the engine is
liquid cooled ...plenty of engine compartment general venting.
About the only signfiicant factor that comes to mind is, it's better to
take the air the engine runs on from higher up on the side of the van,
away from road dust.  Which they do stock.
     With the millions of vanagons running without additional scoops
just fine ..
some even with 230 hpengines .....don't see the need.

On 4/12/2013 11:07 AM, Dan N wrote:
> as far as I know, it's not factory option.
>
> I made a pair as prototype but I can't say effective or not. If you look at
> the passenger side D pillar, there's a plastic block off plate so no air
> get in the engine - then you have to remove that plate.
>
> On Thu, Apr 11, 2013 at 11:33 PM, Dick Wong <sailingfc@dslextreme.com>wrote:
>
>> Anyone have any experience with those air scoops that attach to the rear
>> air
>> inlet grills? Were they "factory" options?  Are they effective?
>>
>> Thanks.
>>
>> -Dick Wong-
>> 78 Scirocco
>> Original Owner
>> 87 Vanagon Syncro 2.5 (slightly crispy)
>> Third Owner
>> 12 Golf TDI
>> Original Co-Owner
>>