diesel mufflers

[20''strong]

i've seen some guys running a diesel muffler on there trucks.Is this a performance thing or a way to correct drone or both.Im curious because my truck has horible drone at certain rpms and i wont to correct this.I have shorties with no cats and a 40's flowmaster dumped before the axel.I have a 3" in and 2 2 1/2 out 40 series that i want to put on and run the tails out to each corner up high and turn them down where you cant see them.would i be wasting my time.dont get me wrong it sounds good 75% of the time,but the 25% makes me want my cats back.also im getting ready to put my cam and converter in and dont want it to sound like guano.

[ThumpinZ]

no cats and dumped before axle is your problem i think.. my droned real bad before i had it turned out in front of the tire. you need to exit somewhere other than the ground. Just from personal experience...