Also as an FYI for those having a drone or a "boom". You definitely have an exhaust leak on the slip fits somewhere. I put one on two days ago, drove to work and back, that "boom/drone" was there on the highway. Came home and sure enough, two of the slip fits had loosened up. Spent an hour or so under the car adjusting, tightening, adjusting, tightening to the point I had zero leaks. Now the exhaust sounds excellent. Little louder on the highway, but nothing the radio won't drown out (even at normal volume). Did get to take it under a tunnel, and holycrap that sounds good.
Next up is the secondary cat delete!