>> Bryan,  odd that the new CAT has no arrow on it.  All the ones I have
ever see  here have an arrow showing the direction of flow.  What make is it
? <<

The box says Davico Mfg on it.

It did have a spot to screw in an O2 sensor on one end so I connected that
end to the pipe coming from the engine (with the real 02 sensor on it).

Thanks,
Bryan