Put on the OE air cleaner housing and did quiet down about half but still has too much "rumble" for her. I asked the original owner if he had an aftermarket muffler on it since he never included that info in the truck description on CL. He said is stock exhaust but I have to admit is noisy. I crawled under there and inspected exhaust from front to rear. I also checked the cat conv shield for loose and all was tight and no holes/leaks. I listened to the muffler with her goosing the accel pedal and you can hear the noise she is talking about. IMO, the baffles are suspect. It is all original under there, which is common here in the PNW with no rust. She is gonna drive it and if she cannot live with the noise, I will get the system replaced. I mean, after all, it has 183k miles on it.
By the way, @Fless
, the spare tire is 3 years old and is the same as the oversize tires on the rig. Good to go.
Did you expect anything less from me?