I have a custom exhaust system (magnaflow)

it sounds much better than stock but it drones too much at low end...

do you think a resonator like this would help to queit?

(http://vr-speed.com/store/vibrant-bo...90-p-1943.html)

and the exhaust system is true dual... then should i get 2 resonators?

 

get the magnaflow resonated x-pipe

 

It should help. And yes, you need 2 if you have a true dual.

 

Vibrant is good stuff. I had one on my 350z before and it made it much better.