Nobody really seemed to see this or want to talk about it, and I thought more people could enjoy it :P
I stumbled across this youtube video, and not sure if anybody else has seen this or posted it:
https://www.youtube.com/watch?v=8SenXGDQptgBut it appears to be an f23 on the 3800, and it looks like he has removed the differential and run the exhaust throughout the axle hole to create a pseudo heat shield with the casting
Anyway, I couldn't find much more info on it, but I thought you guys would appreciate seeing it.
Chris