on my wifes 06 Charger, I swapped the suitcase muffler for a pair of Flowmaster super 40's and left the rear resonators in tact. result was a increase in the growl with no drone at all. I just recently replaced the 5.7 exahust manifolds with 6.1 exhaust manifolds (they are factory shorty headers) and mid pipes. It really opened the car up. pulls harder and has a Old school V8 growl. Slight drone and can hear MDS kick in and out; However, I hardly notice it now and I only drive the car on the weekends. Well worth the swap IMO. Picked up the set of used manifolds and mid pipes off the LX forum for $400.00. I had to pay to have them installed as I do not have the tools nor time to do it myself.
