Right so are there any pictures or examples? You said above: “Check where the muffler connects to the first cat in case he just welded on a used cats section to your original muffler section” Do you have a picture/example what it looks like when a used cat was welded to the original muffler section? And the opposite example/picture when a new cat was used? I’m trying to get an idea what’s the difference between the two possibilities (bad case and good case), and a general idea of where/how to look for it once the car is lifted. Drawing on a schema/diagram will do too. Are you able to draw it on picture 6/11 in: Could I sue my mechanic for potentially installing an aftermarket catalytic converter? | Page 2 | PriusChat Or it’s not showing the area you refer to? It sounds like the area you describe is covered by the cat shield so that’s why I couldn’t take pictures of it yet. Thanks again!