Ok, I extended my pipes out to the edge of the bumper and that made a definate difference. The drone is there but not near as bad, and the sound is mellower. Might be able to live with it. I'll run it for a while and see how I like it.
Thanks for all the help.

 

I'm not researching whatever it is your original issue was






but I'm guessing you have the muffler(s) mounted under the cab???