Hey, guys whats up..... Ok I'm trying to remove my catalytic converter from my exhaust system (2001 grand prix). The problem is that I'm not sure which one it is. Coming down from the engine it turns about 45 degrees and goes into a box then out, then straight with a sensor screwed into the pipe, then into another round muffler looking thing with a heat shield tacked onto it. Eventually finishing with the 2 mufflers ending at the tail pipes. Which of those front 2 is the Cat? Thanks guys in advance