[MickM]

I have a friend who took the resonator off and 2 glass packs on his and it sounds great.

 

[68SportFury]

I've thought about this, too. True duals would be really cool, but I also like how quiet the car is.

 

[AHBGuru]

I have a '13 SE with the 3.6, it's got plenty of power. I dont see any meaningful gains, outside of noise, by farting around with the exhaust. More torque would be nice, but that's what the Hemi and 8 spd are for !!!

 

[ImperialCrown]

It already has a cold air intake from the factory. You may not like the sound that a K&N makes. It may also void any remaining powertrain warranties.
I have seen the X-pipe dual exhaust using a single, large twin-inlet/twin-outlet cat. It may not pass emissions in your state if you are in one of the CARB-5 states or if your state tightens its standards.
I agree. Noise may be your only gain and it may run worse.