As for what to do behind the rear wheels, think about tapering or "boat tailing" there too. It'll be harder to do on the left side because of the tail pipe though.
Here's an example in cardboard of what you could think about doing in coro:
Above: radiused the leading edge of the wheel boat tail.
I realize it's not very practical, in terms of hitting stuff. But wanted to go big or go home.
Surprise, surprise, attached flow behind the wheel (at least on the outside - didn't capture the inside).
from:
http://ecomodder.com/forum/showthrea...tml#post143382