Gotzy,
I checked my Bonneville pics and do not have one of the Contrivance modified roadster, maybe some one else has one that shows the headers. Just imagine fairly short stacks, 12-15 inches long and pretty much straight out from the side of the block with a slight, maybe 15 degree bend toward the back at the end of the pipe. Then they added sheet metal between each pipe and added a tapered tail on the last tube. Just another of the many innovative aero things that are on the car. It does not follow the prevailing thinking in the modified roadster class of being low, flat bottomed, pointy nose and straight sides. Again they hold all of the unblown gas records from E through AA so they are doing something right.
Rex