when I bought my 05 5.7 magnum it already had flowmasters and a K&N intake kit. but they also removed the resonators which I assume is why it is making a (drone) noise at certain rpms, I would like to add some kind of resonator to kill the drone but not the muscle sound. I heard that glass packs would help. any suggestions ?

 

Get rid of the flowmaster. Those things are the worse for drone. Magnaflow is much better. Adding the resonators back will reduce drone but also reduce the mud everywhere sound. Glass packs would be worse.

 

Thanks!