So what happens if I plug up that stupid pipe on the side of the cat, the one that keeps breaking off. or put a "test pipe" in place of the cat . We have no inspection here. Will it make any problems if it is plugged? it is almost imposible to fix, last time I stuck a piece of 1/4 in pipe in and epoxied the whole thing.

 

Test pipe. Or hollow it out.

 

Ok but what do I do with that miserable little pipe? plug it , ignore it or what.

 

If you are talking about the pipe that goes from the intake manifold to the cat, unbolt it at the manifold and fab up a block off plate from sheet metal. Then pull that bastard cat out and get a straight pipe. You will be happy.