Drone was a concern for me when I was looking for an axelback. I like the sound of chambered designs, but traditionally they tend to drone. The straight through designs seemed to lack the musclecar tone. But from what I've learned with the 05+ GT's, they all sound great but all pack the drone, some more some less. Resonators will limit drone, but they in turn quiet the car which puts you back at square one, a quiet exhaust. I wanted a loud idle, low drone at cruise, but to scream at higher RPM. Corsa's seem to be they best of the 3 perameters but they come at a 600+ price. For the price (276.00), I settled on the Pacifica Performance/Mac boomtubes and couldn't be happier. There's a thread on the Boomtubes somewhere on here where someone put some extra carpet or some kind of insulation on specific parts of the underbody and didn't notice a bit of drone.