I took jrbexhaust up on his offer and installed the heartthrob hvs muffler in place of my magnaflow muffler. I have it temporarily installed now. Drone seems to be non existent at 3000 rpm now. Now the car is quieter with the windows up rather than down. I made sure to extend the muffler tip parallel to the ground and beyond the bumper, both things seem to make a huge difference in drone. More testing to continue, but first impressions are positive.