I love the way my vibrant sounds. Sounds like u should have went with the perrin system or less than 3" exhaust piping. I put the silencer in once when I bought the system and noticed a difference, but only when your outside the car. Instead of a resonator you should invest in some dynamat and do the whole trunk with it and maybe the floor of the car. That will quiet it down alot and still give the car all the performance it wants and needs. Then you can talk to the people in the back seat without yelling. I personally don't care what people in the back seat are saying. (Silly back seat drivers) Dynamat is the way to go if it is too load for you. Good luck with it.
