Welcome and thank you for your service!
5.4L here, but I'm running American Racing Headers, racing cats, and Corsa Xtreme exhaust. It is LOUD when you want it to be. Drones a little at highway speeds (ok, a lot), but it sounds unlike any other street vehicle I've ever heard. When you get on it, you'll feel like you're running a top fuel dragster. Idles like a cat-less diesel truck (sounds like pushing air).
It's not for everyone, but I love it.
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