HummBob is the man! My exhaust is the Borla catback. Sounds very sweet when you jump on it. Not much cabin noise. Not too much crackle more of a tuned tone. Check out the links HummBob put in. They are pretty close...but they always sounds sweeter to the ear in person. When my wife takes the Hummer out I run to the window like a little kid to hear it pull away......lol....ain't it great how these truck bring out the little kids in us. THANKS HUMMER!
