Thank you for both of your responses. I truly appreciate it.

So I have TIG welded this chassis :-). I have the CAD design, and want to recreate this entire frame with one piece. I could save so much time if I could easily just print a structurally sound frame.
Tig Frame.jpg

@Marm to your earlier point, you saying the a carbon infused plastic would not have a tensile strength stronger than just the plastic?

Even if it would take an expensive printer, simply knowing what material and what printer would be incredibly valuable. I'm in the theoretical trying to figure out if this is possible. Last thing I want is to ride down the street and the kart falls apart haha.

Is there a plastic that would get me close to the strength of this steel frame?