Rear wheel boat tails!!! The diffuser worked as intended quite well, but not as good as it could of, obviously since the car was so high and whatnot...
The materials used were scraps of the same 1/4" sandply cut to match the 1" thick Pink foam insulation cut to rough shape, which also was used for sturdy mounting from layer to layer from to underside of the base.
This seems pretty low, and it is but still haven't managed to hit anything(knocks on wood
) just dont back into the curbs!!
As you can see the bowing of the wood, but its only dew to the humidity, it usually springs back but doesn't disrupt the flow