Don't know about the '03s but a friend has a Banks exhaust on his '95. It sounds good and authorative outside but not much different inside. Sounds like a good compromise. I hate drone in the cab but I love that Cummins sound. A neighbor has a 2nd gen straight piped. It sounds great when he goes by but I wouldn't wan't to take a trip in it. Have you ever run next to a building or concrete barrier with your stock exhaust and rolled the right rear window down to listen to it? The stock exhaust has a nice tone to it but not too much volume. I'm thinking a 4" ID glass pack would make a nice exhaust note if it would last. I've always like the sound of "new" glass packs on gas engines with headers. Smooth and mellow with a nice bark and no fart can racket.
