I also like the tone and volume of the Corsa quite a bit it am worried about the drone when cruising along and the cylinders start going on/off. I think the Corsa removes all the valves. I know they claim “no drone systems” but it seems like removing those valves will result in strange resonances. Hoping at some point something like the Range/Pulsar units are finished for 21+‘s and then the valves aren’t so important. If anyone has installed or when you do install, would appreciate hearing opinions or even better sound clips of cruising along at 75mph.