I recently installed a RoadsterSport 3 exhaust to my 1995. It has a horrible drone from 2,750-3,250rpm once the exhaust gets warm. It's bleeding ears bad. The baffles help very, very slightly, but even the packed baffle still drones. I did a lot of research on this exhaust and a common praise people had was its lack of drone so I don't know what's going on with mine.
It has about 750 miles on it so far, so I think it's broken in enough. I replaced the gasket that came with the exhaust at about 600 miles because it had failed or never sealed properly to begin with. There was a huge carbon streak across the gasket. I thought for sure that's what was causing the drone. I replaced the bad gasket with a Walker OEM style and also used some Permatex copper RTV for good measure. The flanges were held flush before putting the bolts on and the bolts were tightened to 40ft/lbs. I was disappointed to find that the drone hadn't even been slightly reduced with the new gasket. I'm fairly sure that I installed everything correctly and that's not where the issue is coming from, but I'm open to ideas.
After searching this forum I found someone with a similar issue and they were told to stuff the trunk with blankets to see if that would help. I tried that and if anything it made it slightly worse.
I really love the sound of this exhaust everywhere but 2,750-3,250. And considering I spend most of my time in that range, I can't bear it for much longer without fixing the drone. I'm seriously considering selling or returning this exhaust and going back to OEM if it can't be fixed and I really don't want to. It's unbearable. I'm open to any suggestions.