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Originally Posted by sanddrag
And they'll be able to do 180 degrees and get 4 pieces the same? And by chance do you know how much a straight exhaust pipe (like 2") costs per foot?
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If they have a simple manual hydraulic bender like the one that you linked to, they would typically bend it using several partial passes of another radius, and work their way up to the full shape. You'd have to consult them to see how accurately they can do this, with their equipment. If they have a computerized hydraulic bender (a large exhaust shop would likely have one), they should be able to do it in one or two passes.
I don't know the price for exhaust tubing off hand, but I'd be concerned about it properly supporting a 40 pound car, especially considering the forces as the car rounds the curve at speed. Can you consider mild steel or 4140 structural tubing (more for the wall thickness, than for any special material properties)?