Originally Posted by full_tilt

I'll agree that a pan would have been better, but it would not have been simple and I spent a lot of time thinking about it. My fuel cell hung down just behind the differential cover and panhard bar that moves up and down obviously. I didn't want to start the pan just anywhere, as it would once again catch air into the rear cavity. However, a pan that continued from the body in front of the axle and continued underneath the axle would have been extremely difficult, especially with the welded lower control arm brackets that extend much lower than the stock control arm brackets/shock mounts. Seemed to me like it would have been anything but simple.

Originally Posted by Z28SORR

Do you mean the ones on the rear side? There are none on the back!
I believe these are to releave the high pressure created by the rear tire rotation, from the fender well not from the bumper. It's a very simple thing to build a pan that incloses this area, that way the air doesn't get in there in the first place!

Originally Posted by Brangeta

Nah, I'm talking about the entire rear bumper on a stock Camaro. Callaway found it was like a parachute if I remember right, so they designed their rear bumper to be more like a Corvette's.

The gills on the sides are for extracting air from underneath, yes. I dunno how functional they are. I still haven't seen a C8 in person much to my disappointment... I'd love to stick my head underneath one and look around at the underside of the aerobody.

Originally Posted by full_tilt

Check this out. It looks like some guys across the pond were having this same argument and did some testing on the Autobahn!

http://www.ek9.org/forum/interior-ex...-faster-3.html

Originally Posted by Brangeta

They tested a similar myth already FWIW. It involved truck beds with the flap up, flap down, and with a net replacing the flap. I don't remember the results.