I tried the mufflex option first, it wasn't too loud but droned a lot. I then installed the Magnaflow 12909 muffler, it's not a direct fit but it's in there. Not as loud as the mufflex but has ZERO drone. Not sure if i'll stick with this for long, may try a Flowmaster 50 series HD with stock resonator. Here's a startup, and drive-bye.
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