all i need is good mufflers.

Check out Spintech mufflers. Have used them a few times and love the sound. I had never experienced drone in my Cuda or Charger with them. I was using an x pipe and full exhaust, not sure if that made the difference or not. They were the sportsman series, a touch louder idling than I would have liked, but a little too quiet when I added resonators. They sounded wicked at full throtttle, though! I just placed an order for the sportsman XL - they added a few more spin traps for more sound control.