Carbon Monoxide

I feel after driving my 68 Cuda that I am experiencing symptoms that might be brought on from breathing in carbon monoxide. The exhaust system from the engine to the rear bumper is new and has zero leaks.

Where at the bumper does it terminate? The ends should be out under the physical steel of the bumper, and not forward of it.

I was very careful when I put mine on to make sure it ended up there.