[Hyper4mance2k]

OMFG... I hope the OP wasn't referring to the post long ago by someone insinuating that the miss-fitment of their exhaust rubbing against the car was the cause of drone. That's not drone, that the sound of rubbing. Said member has a habit of taking language and applying their own meaning to that language and promoting it as fact.

Drone is the observation of reverberations of harmonic frequencies that resonate in the cabin. Laymen's terms: sound that isn't absorbed in the mufflers will fill the cabin and the cabin acts like a speaker box vibrating your brain at specific resonate frequencies often observed as the car being totally livable except at X RPM. The only way to eliminate drone is to silence the exhaust. Resonators help with high frequency sound waves and mufflers act to limit lower frequency sound waves.

Add mufflers and resonators -or things like catalytic converters, anything that disrupts sound waves, to eliminate drone. You can also add a ton of sound absorption material -of which the 86, purposely, has very little.
I have a Skunk2 header, Berk over pipe, Berk front pipe, and a custom Magnaflow exhaust and I have no drone at all. The whole exhaust is 2.5" form the header collector and mandrel bent all the way back. I added a vibrant resonator to the front pipe to reduce rasp(high frequency sound). I have a very long resonator in the "mid-pipe" and I have a Magnaflow muffler in the back.