I like those Aero Turbine mufflers. We just put a nice, choppy, aftermarket cam in a friend's 2011 challenger SRT8 and headers with true duals, no cats, with 2.5" pipes all the way to the back and the chrome Aero Turbines just like you have right under the back bumper where the stock pipes exited. This thing sounds totally badass! It actually sounds a lot like glasspacks, only with a bassier rumble, but a nice snotty bark and crackle when you really get on it. If anyone's thinking of getting the Aeros, I'd totally go for true duals w/o cats. Although maybe that's just the way we do things here in Florida because we have no inspections or emissions testing. Hell they even run true duals with no cat on v-6's around here.
Dave