The factory lines are made on machined dies, in a press, so the radiuses are close and tight with no kinks.
If one ever replaced brake or fuel lines on a vehicle, you know a tight close bend results in a kink.
Hand operated benders only allow for the radius to be a gentle one.
The larger the tubing diameter, the larger the radius.
If you ever looked at an exhaust system you can see marks where the mandrels were clamped to the pipe to keep it from kinking.
The mandrels keep the pipe from kinking while bending.
Of course an exhaust system works more efficient with long flowing bends.
If there is enough room for the first flowing bend to clear the fan ,prolly one can make the next one along the frame, towards the front.
When I made lines for my power steering conversion, I retained the factory lines from/to the hydro, but custom bent lines to the spool valve, steering cyl and steering unit.
One can make some awful pretty lines/bends using a hand bender, but one has to allow room for the bends as they are not going to be tight radiuses like bends made in a die.
Hope this explains things.
