I did the muffler delete and I got so sick of the drone! It was bad from 1900 to 2200 rpm's. At first I thought I would get used to it because the sound was so much better over stock but after some time I just didn't like it. So I went full headers and cb system and now I'm a happy camper.
2010 2SS/RS IOM 6SM LS3
Kooks headers / Hi Flow Cats / Magnaflow CB / K&N CAI / Dyno Tune