Far as I know that's just a name.
They are not adjustable in the normal sense.

The best shock I've found ....pricey...but I *love* them - Bilstein Heavy
Duty. 
Just perfect control and good,  tight but not harsh ride.
They are like 90 bucks each.
After 90,000 miles in a vanagon I thought they weren't as crisp and perfect
as new....
But .....that's to be expected.

Scott
www.turbovans.com 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
alfred bagdan
Sent: Saturday, July 28, 2007 4:25 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Shocks

A few years ago, I replaced my original shocks with KYB shocks and regretted
it ever since.  The KYB shocks are very harsh, every bump sounds like
crossing a rail track.  It sure took out the "Fahrvergnuegen" out of
driving.

Upon browsing the Busdepot for shocks, I read that the rear KYB's are
Gas-Adjust; does that mean they are adjustble?, if so it would make them
less harsh.

Which shock feels most like driving the original van?  I would like to get
back the Fahrvergnuegen.

Thanks

Alfred
85 Westy