Per Boston Bob's recommendation I put scoops on my van's intakes.  Since I
am running and air cooled It seemed like adding a bit of air flow could be a
great thing.  These scoops are homemade and a bit different than what is on
ebay.  I like the fact that they are so low profile though they may not be
as effective.  As I understood just adding a trailing edge would make a big
difference so that is all that I was going for.

Photos:

http://www.flickr.com/photos/27607241@N00/2550961787/

http://www.flickr.com/photos/27607241@N00/2550961797/

From most angles you don't see the rivets like you do in this photo.  Most
folks would never notice the extensions.

Jonathan Poole
'83 ac westy