My 5.0 is quiet unless you are really in it...and even then most of the sound is the whistling from the K and N air filter. I live in VA which means you have to be sneaky about exhaust upgrades. I've considered hollowing out the cats, but I haven't actually done it as I have no idea how loud that will make it. It doesn't have to be ridiculously loud, but I wish I could at least hear it. Any suggestions on how to make a 5.0 sound good, without changing the appearance of the exhaust? Many thanks.