It was Cd that wanted CFD software tested.
ecomodder.com/forum/showthread.php/can-you-test-out-free-cfd-software-39117.html
In my case, I'm watching for someone to implement CFD in the Blender physics engine. I do have Blender 2.92 running, but I've been using it to design geodesic domes.
The potential for CFD is there because Blender has implemented OpenVDB.
The Tepee header is an interesting case. One Coanda nozzle right about the license plate location. It would look like a Breer stinger (the one on the right)
Now updating this is something I could do in Blender, if I can find the Beetle model. Hmmmm, an aerospike? Minimal exhaust mixing?