Love this thread! It deserves more attention
I like the idea for the down pipe. Reminds me exactly of what I did for a radiator bracket. Also I saw someone who used metal bands around the rubber pieces the exhaust hangs off of. Helps with the muffler if the outlet is hanging too low from the bumper or if it hangs too low to the ground.
Don't think this has ever been done before but..
Here's my idea:
Cut out the rear window of the hatch and put a couple motors on each side with some hinges. That way I can pop it up a few inches like a sunroof and have some air flowing right through. I love the feeling of having a rear window that opens up. It's so much smoother that having the air beating in the front windows.
And here's a picture:
idea#1.png