So when you're fixing an exhaust system that leaks at a flange, pro tip: check other nearby flanges for leaks. You might see something like this:
yeah, I fixed the leak at the rear of the cat and replaced the muffler, but didn't even notice that leak at the front of the cat. Jumped in super excited and started the engine, and it was just as loud as before. :-(
so tonight after work I'll start on that. Shouldn't be too bad, will just need a straight section with 2.5" ID on one end and 2.5" OD on the other, plus 1 clamp because I don't have 360-degree access in front of the cat.