Rear down bar question

[TheJDMan]

It depends on what rule book you are referring to. Both SCCA and NHRA specifically state that the rear down bars must be straight with no bends. As such the above rear bars are not competition legal in those sanctioning bodies. Also, many smaller organizations use SCCA rules rather than developed their own, so those down bars might be problematic in those events as well.

Here is a pic of a NASCAR truck series truck. I know these are full tube chassis but it also clearly shows the straight rear down bars.



However, if you are just building something for a street driver or autocross it probably won't make any difference what you do. Just my opinion, an inverted rear bar will not gain you much. IMO, you would be better off with a conventional double loop headache bar that mounts in the bed and could be attached to the frame if you wanted to.