Since I installed my headers the truck has been loud, not too bad in city driving, but on a
highway road trip, it is very loud, no resonance, just plain loud.

I installed the resonator in the pic in front of the muffler and it is perfect.
Smooth, deep, no resonance, 3" straight thru, so no loose of performance and my have even got back some low end torque that you typically loose with headers.

http://www.magnaflow.com/02product/d...rtnumber=14619

 

so you were running straights before you put on the muffler?

 

No, ARH long tubes with their cats and magnaflow 3" cat back, see sig.

http://www.magnaflow.com/02product/d...rtnumber=16740

 

ah, ok, gotcha. I would like to put a resonator in front of mine but I dont think there is room, i have a 13740 which is 40" long.

 

wow, that's a BIGGG muffler