ive got a 2011 srt8 6.4 stick a "hearthrob 3 inch cat back that has two larger glasspack muffler up front and two small glass packs for resonators. The drone is deafening. Not bad at highway speeds in 6th but around town and like going up a hill when theres a load at between idle and 2k it is terrible. I tried sound matting the whole floor and wheel wells up to the front seat backs and it didnt help a thing. I ordered a magnaflow axle back (resonator and tips) thinking it would help but it was 700 bucks and i got thinking if it didnt help and i had to buy a whole cat back id have wasted money. One other problem is this system sounds fantastic when you get on it. Sounds like the old muscle cars i grew up with and i hate to loose that and have a car that sounds like a european sports car. Any suggestions as to a cheaper fix or any suggestions to a differnt cat back that has a nasty snarl to it when accelerating but no drone or at least very little. Anyone have a borla atak? Drone?