I'm considering installing a more mellow sounding muffler. A Thrush maybe, but open to other options. Nothing loud or coarse sounding, just a mellow sound. Suggestions anyone.

 

I changed my muffler to a magnaflow, and it created this unbearable drone throughout the van just after takeoff. I had to go back and have a resonator put on.
Make sure you don't impede flow, and have the same harmonic issue I had.....