Found a nice pic on several forums of a slick two-piece "wing", but could not find any more information:
Here, at
TurboDieselRegister
EDIT: Tried to find more information about this, but came away only with:
AIR FLOW
PH# 1-877-655-3244
WEB SITE= Wind-Tunnel-Designs.com
e-mail save @2wtd.com
.