Cherry Bomb Extreme Cat-Back - 2010 SS 6M with no other mods.
No drone at any RPM in any gear. I went into this install expecting it to sound rough being that the resonators were pulled out but it really sounds no different between 60-80 mph in 5th or 6th gear.
Overall, the sound is great with a nice deep tone and like the name implies, extreme when it needs to be.