Some guys just cut off the mufflers and install a chambered muffler where the resonator is. Here is one example............2005 Pontiac Grand Prix GXP exhaust - YouTube..........................for a bit less, you can get the same product from sweet thunder. I actually just cut off my mufflers last night and was going to do this but checking the cost, I will just buy my friends flowmasters and cut off the resonator. Since this is my DD, I don't want it to be too loud but don't want to hide the LS4 sound. :-)
