I had a guy in an S-10 with a 4.3 expelling gasses into a 4" flex Y-pipe and no muffler tell me the same thing at a car show after he parked beside of me. I told him it sounded good, as I'm sure he didn't have the funds for a nice car with sweet exhaust. It got awkward when he asked if he could sit in my car with it running, as he has back problems and said the lopey idle would feel good on his back. I could not make this stuff up. I need to drive the car more often, take notes, write a book, and just retire off of the stories... Lol.